failure: repodata/repomd.xml from extras: [Errno 256] No more mirrors to try.
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 95598 milliseconds')
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Damaged repomd.xml file
root@centos7 yum.repos.d\]# ntpdate 120.25.108.11
9 Jul 00:35:35 ntpdate\[17012\]: no server suitable for synchronization found
```bash
root@192.168.235.130's password:
┌────────────────────────────────────────────────────────────────────┐
│ • MobaXterm 20.0 • │
│ (SSH client, X-server and networking tools) │
│ │
│ ➤ SSH session to root@192.168.235.130 │
│ • SSH compression : ✘ │
│ • SSH-browser : ✔ │
│ • X11-forwarding : ✘ (disabled or not supported by server) │
│ • DISPLAY : 192.168.1.171:0.0 │
│ │
│ ➤ For more info, ctrl+click on help or visit our website │
└────────────────────────────────────────────────────────────────────┘
Last login: Tue Jul 8 22:59:51 2025
[root@centos7 ~]# yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
repo id repo name
local local nam
repolist: 4,070
[root@centos7 ~]# yum install wget -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package wget.x86_64 0:1.14-18.el7_6.1 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
===================================================================================================================================================
Package Arch Version
===================================================================================================================================================
Installing:
wget x86_64 1.14-18.el7_
Transaction Summary
===================================================================================================================================================
Install 1 Package
Total download size: 547 k
Installed size: 2.0 M
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : wget-1.14-18.el7_6.1.x86_64
Verifying : wget-1.14-18.el7_6.1.x86_64
Installed:
wget.x86_64 0:1.14-18.el7_6.1
Complete!
[root@centos7 ~]# cd /etc/yum.repos.d
[root@centos7 yum.repos.d]# ls
local.repo repo.tar.gz
[root@centos7 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/centos7_base .repo
--2025-07-08 23:37:21-- http://mirrors.cloud.tencent.com/centos7_base.repo
Resolving mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)... 122.225.32.220, 240e:f7:4f00:2502:2c::7
Connecting to mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)|122.225.32.220|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2025-07-08 23:37:22 ERROR 404: Not Found.
[root@centos7 yum.repos.d]# ping www.baidu.com
PING www.wshifen.com (103.235.46.115) 56(84) bytes of data.
64 bytes from 103.235.46.115 (103.235.46.115): icmp_seq=1 ttl=128 time=121 ms
^C
--- www.wshifen.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 121.546/121.546/121.546/0.000 ms
[root@centos7 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base,repo
--2025-07-08 23:44:49-- http://mirrors.cloud.tencent.com/repo/centos7_base,repo
Resolving mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)... 122.225.32.220, 240e:f7:4f00:2502:2c::7
Connecting to mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)|122.225.32.220|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2025-07-08 23:44:50 ERROR 404: Not Found.
[root@centos7 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo
--2025-07-08 23:45:03-- http://mirrors.cloud.tencent.com/repo/centos7_base.repo
Resolving mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)... 122.225.32.220, 240e:f7:4f00:2502:2c::7
Connecting to mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)|122.225.32.220|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1694 (1.7K) [application/octet-stream]
Saving to: '/etc/yum.repos.d/CentOS-Base.repo'
100%[=========================================================================================>] 1,694 --.-K/s in 0s
2025-07-08 23:45:03 (47.9 MB/s) - '/etc/yum.repos.d/CentOS-Base.repo' saved [1694/1694]
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: extras local os updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.c om/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 186158 milliseconds')
Trying other mirror.
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Da maged repomd.xml file
Trying other mirror.
One of the configured repositories failed (Qcloud centos extras - x86_64),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=extras ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable extras
or
subscription-manager repos --disable=extras
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=extras.skip_if_unavailable=true
failure: repodata/repomd.xml from extras: [Errno 256] No more mirrors to try.
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com /centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 186158 milliseconds')
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Dama ged repomd.xml file
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo local.repo repo.tar.gz
[root@centos7 yum.repos.d]# tar -zcf local.tar.gz local.repo
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo local.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# rm -f local.repo
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: extras os updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
extras | 2.9 kB 00:00:00
os | 3.6 kB 00:00:00
updates | 2.9 kB 00:00:00
(1/10): extras/7/x86_64/filelists_db | 305 kB 00:00:00
(2/10): extras/7/x86_64/other_db | 154 kB 00:00:00
(3/10): os/7/x86_64/filelists_db | 7.2 MB 00:00:01
(4/10): os/7/x86_64/primary_db | 6.1 MB 00:00:01
(5/10): os/7/x86_64/other_db | 2.6 MB 00:00:00
(6/10): updates/7/x86_64/primary_db | 27 MB 00:00:05
(7/10): updates/7/x86_64/other_db | 1.6 MB 00:00:00
ss
^C
Exiting on user cancel
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: extras os updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.c om/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 49611 milliseconds')
Trying other mirror.
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Da maged repomd.xml file
Trying other mirror.
One of the configured repositories failed (Qcloud centos extras - x86_64),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=extras ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable extras
or
subscription-manager repos --disable=extras
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=extras.skip_if_unavailable=true
failure: repodata/repomd.xml from extras: [Errno 256] No more mirrors to try.
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com /centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 49611 milliseconds')
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Dama ged repomd.xml file
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# cat CentOS-Base.repo
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[os]
name=Qcloud centos os - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/os/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[updates]
name=Qcloud centos updates - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/updates/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[centosplus]
name=Qcloud centosplus - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/centosplus/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[cr]
name=Qcloud centos cr - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/cr/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[extras]
name=Qcloud centos extras - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/extras/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[fasttrack]
name=Qcloud centos fasttrack - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/fasttrack/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[root@centos7 yum.repos.d]# yum cleanall
Loaded plugins: fastestmirror
No such command: cleanall. Please use /usr/bin/yum --help
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: extras os updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 103913 milliseconds')
Trying other mirror.
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Damaged repomd.xml file
Trying other mirror.
One of the configured repositories failed (Qcloud centos extras - x86_64),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=extras ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable extras
or
subscription-manager repos --disable=extras
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=extras.skip_if_unavailable=true
failure: repodata/repomd.xml from extras: [Errno 256] No more mirrors to try.
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 103913 milliseconds')
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Damaged repomd.xml file
[root@centos7 yum.repos.d]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
[root@centos7 yum.repos.d]# wget -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
File contains no section headers.
file: file:///etc/yum.repos.d/CentOS-Base.repo, line: 1
'--2025-07-09 00:03:30-- http://mirrors.cloud.tencent.com/repo/centos7_base.repo\n'
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
File contains no section headers.
file: file:///etc/yum.repos.d/CentOS-Base.repo, line: 1
'--2025-07-09 00:03:30-- http://mirrors.cloud.tencent.com/repo/centos7_base.repo\n'
[root@centos7 yum.repos.d]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
mv: overwrite '/etc/yum.repos.d/CentOS-Base.repo.backup'?
[root@centos7 yum.repos.d]# ls
centos7_base.repo CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# cat centos7_base.repo
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[os]
name=Qcloud centos os - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/os/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[updates]
name=Qcloud centos updates - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/updates/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[centosplus]
name=Qcloud centosplus - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/centosplus/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[cr]
name=Qcloud centos cr - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/cr/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[extras]
name=Qcloud centos extras - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/extras/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[fasttrack]
name=Qcloud centos fasttrack - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/fasttrack/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[root@centos7 yum.repos.d]# ld
ld: no input files
[root@centos7 yum.repos.d]# ls
centos7_base.repo CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# rm -f centos7_base.repo
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
mv: overwrite '/etc/yum.repos.d/CentOS-Base.repo.backup'? yes
[root@centos7 yum.repos.d]# ls -l
total 12
-rw-r--r--. 1 root root 568 Jul 9 00:03 CentOS-Base.repo.backup
-rw-r--r--. 1 root root 176 Jul 8 23:50 local.tar.gz
-rw-r--r--. 1 root root 2705 Jul 8 23:16 repo.tar.gz
[root@centos7 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo
--2025-07-09 00:10:17-- http://mirrors.cloud.tencent.com/repo/centos7_base.repo
Resolving mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)... 42.7.49.72, 240e:f7:4f00:2502:2c::7
Connecting to mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)|42.7.49.72|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1694 (1.7K) [application/octet-stream]
Saving to: '/etc/yum.repos.d/CentOS-Base.repo'
100%[=========================================================================================================>] 1,694 --.-K/s in 0s
2025-07-09 00:10:18 (74.8 MB/s) - '/etc/yum.repos.d/CentOS-Base.repo' saved [1694/1694]
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: extras os updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 95598 milliseconds')
Trying other mirror.
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Damaged repomd.xml file
Trying other mirror.
One of the configured repositories failed (Qcloud centos extras - x86_64),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=extras ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable extras
or
subscription-manager repos --disable=extras
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=extras.skip_if_unavailable=true
failure: repodata/repomd.xml from extras: [Errno 256] No more mirrors to try.
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 95598 milliseconds')
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Damaged repomd.xml file
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# rm -rf CentOS-Base.repo
[root@centos7 yum.repos.d]# curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.tencent.com/repo/centos7_base.repo
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
^C
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
--2025-07-09 00:24:33-- http://mirrors.aliyun.com/repo/Centos-7.repo
Resolving mirrors.aliyun.com (mirrors.aliyun.com)... 36.249.88.92, 36.250.15.232, 36.250.15.227, ...
Connecting to mirrors.aliyun.com (mirrors.aliyun.com)|36.249.88.92|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2523 (2.5K) [application/octet-stream]
Saving to: '/etc/yum.repos.d/CentOS-Base.repo'
100%[=========================================================================================================>] 2,523 --.-K/s in 0s
2025-07-09 00:24:33 (127 MB/s) - '/etc/yum.repos.d/CentOS-Base.repo' saved [2523/2523]
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: base extras updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
^Chttp://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 95270 milliseconds')
Trying other mirror.
^Chttp://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
Trying other mirror.
^Chttp://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
Trying other mirror.
^Chttp://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
Trying other mirror.
One of the configured repositories failed (CentOS-7 - Base - mirrors.aliyun.com),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=base ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable base
or
subscription-manager repos --disable=base
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=base.skip_if_unavailable=true
failure: repodata/repomd.xml from base: [Errno 256] No more mirrors to try.
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 95270 milliseconds')
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# vim CentOS-Base.repo
-bash: vim: command not found
[root@centos7 yum.repos.d]# vi CentOS-Base.repo
[root@centos7 yum.repos.d]# cat CentOS-Base.repo
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[base]
name=CentOS-$releasever - Base - mirrors.aliyun.com
failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos/$releasever/os/$basearch/
https://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/
https://mirrors.cloud.aliyuncs.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates - mirrors.aliyun.com
failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos/$releasever/updates/$basearch/
https://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/
https://mirrors.cloud.aliyuncs.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - mirrors.aliyun.com
failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
https://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/
https://mirrors.cloud.aliyuncs.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - mirrors.aliyun.com
failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/
https://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/
https://mirrors.cloud.aliyuncs.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib - mirrors.aliyun.com
failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/
https://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/
https://mirrors.cloud.aliyuncs.com/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: base extras updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
^Chttps://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 12] Timeout on https://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 48354 milliseconds')
Trying other mirror.
^Chttps://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
Trying other mirror.
^Chttps://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
Trying other mirror.
^Chttps://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
Trying other mirror.
One of the configured repositories failed (CentOS-7 - Base - mirrors.aliyun.com),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=base ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable base
or
subscription-manager repos --disable=base
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=base.skip_if_unavailable=true
failure: repodata/repomd.xml from base: [Errno 256] No more mirrors to try.
https://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 12] Timeout on https://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 48354 milliseconds')
https://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
https://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
https://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# rm -f CentOS-Base.repo
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# tar xf local.tar.gz
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: local
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
local | 3.6 kB 00:00:00
(1/4): local/group_gz | 153 kB 00:00:00
(2/4): local/primary_db | 3.3 MB 00:00:00
(3/4): local/filelists_db | 3.3 MB 00:00:00
(4/4): local/other_db | 1.3 MB 00:00:00
Metadata Cache Created
[root@centos7 yum.repos.d]# yum install bash-completion vim net-tools nepdate -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
No package nepdate available.
Resolving Dependencies
--> Running transaction check
---> Package bash-completion.noarch 1:2.1-8.el7 will be installed
---> Package net-tools.x86_64 0:2.0-0.25.20131004git.el7 will be installed
---> Package vim-enhanced.x86_64 2:7.4.629-7.el7 will be installed
--> Processing Dependency: vim-common = 2:7.4.629-7.el7 for package: 2:vim-enhanced-7.4.629-7.el7.x86_64
--> Processing Dependency: libgpm.so.2()(64bit) for package: 2:vim-enhanced-7.4.629-7.el7.x86_64
--> Running transaction check
---> Package gpm-libs.x86_64 0:1.20.7-6.el7 will be installed
---> Package vim-common.x86_64 2:7.4.629-7.el7 will be installed
--> Processing Dependency: vim-filesystem for package: 2:vim-common-7.4.629-7.el7.x86_64
--> Running transaction check
---> Package vim-filesystem.x86_64 2:7.4.629-7.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
===================================================================================================================================================
Package Arch Version Repository Size
===================================================================================================================================================
Installing:
bash-completion noarch 1:2.1-8.el7 local 87 k
net-tools x86_64 2.0-0.25.20131004git.el7 local 306 k
vim-enhanced x86_64 2:7.4.629-7.el7 local 1.1 M
Installing for dependencies:
gpm-libs x86_64 1.20.7-6.el7 local 32 k
vim-common x86_64 2:7.4.629-7.el7 local 5.9 M
vim-filesystem x86_64 2:7.4.629-7.el7 local 11 k
Transaction Summary
===================================================================================================================================================
Install 3 Packages (+3 Dependent packages)
Total download size: 7.4 M
Installed size: 25 M
Downloading packages:
---------------------------------------------------------------------------------------------------------------------------------------------------
Total 5.3 MB/s | 7.4 MB 00:00:01
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : gpm-libs-1.20.7-6.el7.x86_64 1/6
Installing : 2:vim-filesystem-7.4.629-7.el7.x86_64 2/6
Installing : 2:vim-common-7.4.629-7.el7.x86_64 3/6
Installing : 2:vim-enhanced-7.4.629-7.el7.x86_64 4/6
Installing : net-tools-2.0-0.25.20131004git.el7.x86_64 5/6
Installing : 1:bash-completion-2.1-8.el7.noarch 6/6
Verifying : 2:vim-common-7.4.629-7.el7.x86_64 1/6
Verifying : 2:vim-filesystem-7.4.629-7.el7.x86_64 2/6
Verifying : 1:bash-completion-2.1-8.el7.noarch 3/6
Verifying : net-tools-2.0-0.25.20131004git.el7.x86_64 4/6
Verifying : gpm-libs-1.20.7-6.el7.x86_64 5/6
Verifying : 2:vim-enhanced-7.4.629-7.el7.x86_64 6/6
Installed:
bash-completion.noarch 1:2.1-8.el7 net-tools.x86_64 0:2.0-0.25.20131004git.el7 vim-enhanced.x86_64 2:7.4.629-7.el7
Dependency Installed:
gpm-libs.x86_64 0:1.20.7-6.el7 vim-common.x86_64 2:7.4.629-7.el7 vim-filesystem.x86_64 2:7.4.629-7.el7
Complete!
[root@centos7 yum.repos.d]# ntpdate 120.25.108.11
-bash: ntpdate: command not found
[root@centos7 yum.repos.d]# yum install ntpdate -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package ntpdate.x86_64 0:4.2.6p5-29.el7.centos.2 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
===================================================================================================================================================
Package Arch Version Repository Size
===================================================================================================================================================
Installing:
ntpdate x86_64 4.2.6p5-29.el7.centos.2 local 87 k
Transaction Summary
===================================================================================================================================================
Install 1 Package
Total download size: 87 k
Installed size: 121 k
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : ntpdate-4.2.6p5-29.el7.centos.2.x86_64 1/1
Verifying : ntpdate-4.2.6p5-29.el7.centos.2.x86_64 1/1
Installed:
ntpdate.x86_64 0:4.2.6p5-29.el7.centos.2
Complete!
[root@centos7 yum.repos.d]# ntpdate 120.25.108.11
9 Jul 00:35:35 ntpdate[17012]: no server suitable for synchronization found
[root@centos7 yum.repos.d]# ntpdate
9 Jul 00:35:46 ntpdate[17125]: no servers can be used, exiting
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# rm local.repo
rm: remove regular file 'local.repo'?
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# rm -f local.repo
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
--2025-07-09 00:46:06-- https://mirrors.aliyun.com/repo/Centos-7.repo
Resolving mirrors.aliyun.com (mirrors.aliyun.com)... 36.249.88.86, 36.250.15.228, 36.250.15.232, ...
Connecting to mirrors.aliyun.com (mirrors.aliyun.com)|36.249.88.86|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2523 (2.5K) [application/octet-stream]
Saving to: '/etc/yum.repos.d/CentOS-Base.repo'
100%[=========================================================================================================>] 2,523 --.-K/s in 0s
2025-07-09 00:46:06 (145 MB/s) - '/etc/yum.repos.d/CentOS-Base.repo' saved [2523/2523]
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: base extras updates
Cleaning up list of fastest mirrors
Other repos take up 51 M of disk space (use --verbose for details)
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
base | 3.6 kB 00:00:00
extras | 2.9 kB 00:00:00
updates | 2.9 kB 00:00:00
(1/10): extras/7/x86_64/filelists_db | 305 kB 00:00:00
(2/10): extras/7/x86_64/primary_db | 253 kB 00:00:00
(3/10): extras/7/x86_64/other_db | 154 kB 00:00:00
(4/10): base/7/x86_64/group_gz | 153 kB 00:00:00
(5/10): base/7/x86_64/other_db | 2.6 MB 00:00:00
(6/10): updates/7/x86_64/other_db | 1.6 MB 00:00:00
(7/10): updates/7/x86_64/filelists_db | 15 MB 00:00:01
base/7/x86_64/primary_db FAILED
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/6d0c3a488c282fe537794b5946b01e28c7f44db79097bb06826e1c0c88bad5ef-primary.sqlite.bz2: [Errno 14] curl#7 - "Failed connect to mirrors.cloud.aliyuncs.com:80; Connection refused"
Trying other mirror.
base/7/x86_64/filelists_db FAILED ===== ] 267 kB/s | 25 MB 00:02:16 ETA
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/d6d94c7d406fe7ad4902a97104b39a0d8299451832a97f31d71653ba982c955b-filelists.sqlite.bz2: [Errno 14] curl#7 - "Failed connect to mirrors.aliyuncs.com:80; Connection refused"
Trying other mirror.
(8/10): base/7/x86_64/primary_db | 6.1 MB 00:00:00
(9/10): base/7/x86_64/filelists_db | 7.2 MB 00:00:00
updates/7/x86_64/primary_db FAILED
http://mirrors.aliyuncs.com/centos/7/updates/x86_64/repodata/f19044932626155f0cd849e88972b84875fc85e3308b4d622844a911c4ef54d0-primary.sqlite.bz2: [Errno 14] curl#7 - "Failed connect to mirrors.aliyuncs.com:80; Connection refused"
Trying other mirror.
(10/10): updates/7/x86_64/primary_db | 27 MB 00:00:01
Metadata Cache Created
[root@centos7 yum.repos.d]# yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
repo id repo name status
!base/7/x86_64 CentOS-7 - Base - mirrors.aliyun.com 10,072
!extras/7/x86_64 CentOS-7 - Extras - mirrors.aliyun.com 526
!updates/7/x86_64 CentOS-7 - Updates - mirrors.aliyun.com 6,173
repolist: 16,771
[root@centos7 yum.repos.d]# ping 120.25.108.11
PING 120.25.108.11 (120.25.108.11) 56(84) bytes of data.
^C
--- 120.25.108.11 ping statistics ---
14 packets transmitted, 0 received, 100% packet loss, time 13003ms
[root@centos7 yum.repos.d]# ping www.baidu.com
PING www.wshifen.com (103.235.46.115) 56(84) bytes of data.
64 bytes from 103.235.46.115 (103.235.46.115): icmp_seq=1 ttl=128 time=113 ms
64 bytes from 103.235.46.115 (103.235.46.115): icmp_seq=2 ttl=128 time=116 ms
^C
--- www.wshifen.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 113.805/114.918/116.032/1.163 ms
[root@centos7 yum.repos.d]# ping 120.25.108.11
PING 120.25.108.11 (120.25.108.11) 56(84) bytes of data.
^C
--- 120.25.108.11 ping statistics ---
17 packets transmitted, 0 received, 100% packet loss, time 16008ms
[root@centos7 yum.repos.d]# ntpdate ntp.aliyun.com
9 Jul 20:58:52 ntpdate[27920]: adjust time server 203.107.6.88 offset -0.317821 sec
[root@centos7 yum.repos.d]#
[root@centos7 yum.repos.d]# shutdown
Shutdown scheduled for Wed 2025-07-09 21:01:45 CST, use 'shutdown -c' to cancel.
[root@centos7 yum.repos.d]#
Broadcast message from root@centos7.cn (Wed 2025-07-09 21:00:45 CST):
The system is going down for power-off at Wed 2025-07-09 21:01:45 CST!
```
\[root@centos7 mysql_3306\]# yum install devtoolset-9 -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org?arch=x86_64\&release=7\&repo=sclo-rh error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"
One of the configured repositories failed (Unknown),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo= ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable
or
subscription-manager repos --disable=
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=.skip_if_unavailable=true
Cannot find a valid baseurl for repo: centos-sclo-rh/x86_64
```bash
root@192.168.235.130's password:
┌────────────────────────────────────────────────────────────────────┐
│ • MobaXterm 20.0 • │
│ (SSH client, X-server and networking tools) │
│ │
│ ➤ SSH session to root@192.168.235.130 │
│ • SSH compression : ✘ │
│ • SSH-browser : ✔ │
│ • X11-forwarding : ✘ (disabled or not supported by server) │
│ • DISPLAY : 192.168.1.171:0.0 │
│ │
│ ➤ For more info, ctrl+click on help or visit our website │
└────────────────────────────────────────────────────────────────────┘
Last login: Tue Jul 8 22:59:51 2025
[root@centos7 ~]# yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
repo id repo name
local local nam
repolist: 4,070
[root@centos7 ~]# yum install wget -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package wget.x86_64 0:1.14-18.el7_6.1 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
===================================================================================================================================================
Package Arch Version
===================================================================================================================================================
Installing:
wget x86_64 1.14-18.el7_
Transaction Summary
===================================================================================================================================================
Install 1 Package
Total download size: 547 k
Installed size: 2.0 M
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : wget-1.14-18.el7_6.1.x86_64
Verifying : wget-1.14-18.el7_6.1.x86_64
Installed:
wget.x86_64 0:1.14-18.el7_6.1
Complete!
[root@centos7 ~]# cd /etc/yum.repos.d
[root@centos7 yum.repos.d]# ls
local.repo repo.tar.gz
[root@centos7 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/centos7_base .repo
--2025-07-08 23:37:21-- http://mirrors.cloud.tencent.com/centos7_base.repo
Resolving mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)... 122.225.32.220, 240e:f7:4f00:2502:2c::7
Connecting to mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)|122.225.32.220|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2025-07-08 23:37:22 ERROR 404: Not Found.
[root@centos7 yum.repos.d]# ping www.baidu.com
PING www.wshifen.com (103.235.46.115) 56(84) bytes of data.
64 bytes from 103.235.46.115 (103.235.46.115): icmp_seq=1 ttl=128 time=121 ms
^C
--- www.wshifen.com ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 121.546/121.546/121.546/0.000 ms
[root@centos7 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base,repo
--2025-07-08 23:44:49-- http://mirrors.cloud.tencent.com/repo/centos7_base,repo
Resolving mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)... 122.225.32.220, 240e:f7:4f00:2502:2c::7
Connecting to mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)|122.225.32.220|:80... connected.
HTTP request sent, awaiting response... 404 Not Found
2025-07-08 23:44:50 ERROR 404: Not Found.
[root@centos7 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo
--2025-07-08 23:45:03-- http://mirrors.cloud.tencent.com/repo/centos7_base.repo
Resolving mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)... 122.225.32.220, 240e:f7:4f00:2502:2c::7
Connecting to mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)|122.225.32.220|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1694 (1.7K) [application/octet-stream]
Saving to: '/etc/yum.repos.d/CentOS-Base.repo'
100%[=========================================================================================>] 1,694 --.-K/s in 0s
2025-07-08 23:45:03 (47.9 MB/s) - '/etc/yum.repos.d/CentOS-Base.repo' saved [1694/1694]
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: extras local os updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.c om/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 186158 milliseconds')
Trying other mirror.
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Da maged repomd.xml file
Trying other mirror.
One of the configured repositories failed (Qcloud centos extras - x86_64),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=extras ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable extras
or
subscription-manager repos --disable=extras
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=extras.skip_if_unavailable=true
failure: repodata/repomd.xml from extras: [Errno 256] No more mirrors to try.
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com /centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 186158 milliseconds')
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Dama ged repomd.xml file
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo local.repo repo.tar.gz
[root@centos7 yum.repos.d]# tar -zcf local.tar.gz local.repo
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo local.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# rm -f local.repo
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: extras os updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
extras | 2.9 kB 00:00:00
os | 3.6 kB 00:00:00
updates | 2.9 kB 00:00:00
(1/10): extras/7/x86_64/filelists_db | 305 kB 00:00:00
(2/10): extras/7/x86_64/other_db | 154 kB 00:00:00
(3/10): os/7/x86_64/filelists_db | 7.2 MB 00:00:01
(4/10): os/7/x86_64/primary_db | 6.1 MB 00:00:01
(5/10): os/7/x86_64/other_db | 2.6 MB 00:00:00
(6/10): updates/7/x86_64/primary_db | 27 MB 00:00:05
(7/10): updates/7/x86_64/other_db | 1.6 MB 00:00:00
ss
^C
Exiting on user cancel
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: extras os updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.c om/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 49611 milliseconds')
Trying other mirror.
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Da maged repomd.xml file
Trying other mirror.
One of the configured repositories failed (Qcloud centos extras - x86_64),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=extras ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable extras
or
subscription-manager repos --disable=extras
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=extras.skip_if_unavailable=true
failure: repodata/repomd.xml from extras: [Errno 256] No more mirrors to try.
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com /centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 49611 milliseconds')
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Dama ged repomd.xml file
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# cat CentOS-Base.repo
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[os]
name=Qcloud centos os - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/os/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[updates]
name=Qcloud centos updates - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/updates/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[centosplus]
name=Qcloud centosplus - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/centosplus/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[cr]
name=Qcloud centos cr - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/cr/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[extras]
name=Qcloud centos extras - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/extras/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[fasttrack]
name=Qcloud centos fasttrack - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/fasttrack/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[root@centos7 yum.repos.d]# yum cleanall
Loaded plugins: fastestmirror
No such command: cleanall. Please use /usr/bin/yum --help
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: extras os updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 103913 milliseconds')
Trying other mirror.
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Damaged repomd.xml file
Trying other mirror.
One of the configured repositories failed (Qcloud centos extras - x86_64),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=extras ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable extras
or
subscription-manager repos --disable=extras
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=extras.skip_if_unavailable=true
failure: repodata/repomd.xml from extras: [Errno 256] No more mirrors to try.
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 103913 milliseconds')
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Damaged repomd.xml file
[root@centos7 yum.repos.d]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
[root@centos7 yum.repos.d]# wget -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
File contains no section headers.
file: file:///etc/yum.repos.d/CentOS-Base.repo, line: 1
'--2025-07-09 00:03:30-- http://mirrors.cloud.tencent.com/repo/centos7_base.repo\n'
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
File contains no section headers.
file: file:///etc/yum.repos.d/CentOS-Base.repo, line: 1
'--2025-07-09 00:03:30-- http://mirrors.cloud.tencent.com/repo/centos7_base.repo\n'
[root@centos7 yum.repos.d]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
mv: overwrite '/etc/yum.repos.d/CentOS-Base.repo.backup'?
[root@centos7 yum.repos.d]# ls
centos7_base.repo CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# cat centos7_base.repo
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[os]
name=Qcloud centos os - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/os/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[updates]
name=Qcloud centos updates - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/updates/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[centosplus]
name=Qcloud centosplus - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/centosplus/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[cr]
name=Qcloud centos cr - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/cr/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[extras]
name=Qcloud centos extras - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/extras/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[fasttrack]
name=Qcloud centos fasttrack - $basearch
baseurl=http://mirrors.cloud.tencent.com/centos/$releasever/fasttrack/$basearch/
enabled=0
gpgcheck=1
gpgkey=http://mirrors.cloud.tencent.com/centos/RPM-GPG-KEY-CentOS-7
[root@centos7 yum.repos.d]# ld
ld: no input files
[root@centos7 yum.repos.d]# ls
centos7_base.repo CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# rm -f centos7_base.repo
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
mv: overwrite '/etc/yum.repos.d/CentOS-Base.repo.backup'? yes
[root@centos7 yum.repos.d]# ls -l
total 12
-rw-r--r--. 1 root root 568 Jul 9 00:03 CentOS-Base.repo.backup
-rw-r--r--. 1 root root 176 Jul 8 23:50 local.tar.gz
-rw-r--r--. 1 root root 2705 Jul 8 23:16 repo.tar.gz
[root@centos7 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.cloud.tencent.com/repo/centos7_base.repo
--2025-07-09 00:10:17-- http://mirrors.cloud.tencent.com/repo/centos7_base.repo
Resolving mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)... 42.7.49.72, 240e:f7:4f00:2502:2c::7
Connecting to mirrors.cloud.tencent.com (mirrors.cloud.tencent.com)|42.7.49.72|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1694 (1.7K) [application/octet-stream]
Saving to: '/etc/yum.repos.d/CentOS-Base.repo'
100%[=========================================================================================================>] 1,694 --.-K/s in 0s
2025-07-09 00:10:18 (74.8 MB/s) - '/etc/yum.repos.d/CentOS-Base.repo' saved [1694/1694]
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: extras os updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 95598 milliseconds')
Trying other mirror.
^Chttp://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Damaged repomd.xml file
Trying other mirror.
One of the configured repositories failed (Qcloud centos extras - x86_64),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=extras ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable extras
or
subscription-manager repos --disable=extras
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=extras.skip_if_unavailable=true
failure: repodata/repomd.xml from extras: [Errno 256] No more mirrors to try.
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 95598 milliseconds')
http://mirrors.cloud.tencent.com/centos/7/extras/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for extras: Damaged repomd.xml file
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# rm -rf CentOS-Base.repo
[root@centos7 yum.repos.d]# curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.tencent.com/repo/centos7_base.repo
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
^C
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
--2025-07-09 00:24:33-- http://mirrors.aliyun.com/repo/Centos-7.repo
Resolving mirrors.aliyun.com (mirrors.aliyun.com)... 36.249.88.92, 36.250.15.232, 36.250.15.227, ...
Connecting to mirrors.aliyun.com (mirrors.aliyun.com)|36.249.88.92|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2523 (2.5K) [application/octet-stream]
Saving to: '/etc/yum.repos.d/CentOS-Base.repo'
100%[=========================================================================================================>] 2,523 --.-K/s in 0s
2025-07-09 00:24:33 (127 MB/s) - '/etc/yum.repos.d/CentOS-Base.repo' saved [2523/2523]
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: base extras updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
^Chttp://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 95270 milliseconds')
Trying other mirror.
^Chttp://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
Trying other mirror.
^Chttp://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
Trying other mirror.
^Chttp://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
Trying other mirror.
One of the configured repositories failed (CentOS-7 - Base - mirrors.aliyun.com),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=base ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable base
or
subscription-manager repos --disable=base
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=base.skip_if_unavailable=true
failure: repodata/repomd.xml from base: [Errno 256] No more mirrors to try.
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 12] Timeout on http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 95270 milliseconds')
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
http://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# vim CentOS-Base.repo
-bash: vim: command not found
[root@centos7 yum.repos.d]# vi CentOS-Base.repo
[root@centos7 yum.repos.d]# cat CentOS-Base.repo
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[base]
name=CentOS-$releasever - Base - mirrors.aliyun.com
failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos/$releasever/os/$basearch/
https://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/
https://mirrors.cloud.aliyuncs.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates - mirrors.aliyun.com
failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos/$releasever/updates/$basearch/
https://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/
https://mirrors.cloud.aliyuncs.com/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - mirrors.aliyun.com
failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
https://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/
https://mirrors.cloud.aliyuncs.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - mirrors.aliyun.com
failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/
https://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/
https://mirrors.cloud.aliyuncs.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib - mirrors.aliyun.com
failovermethod=priority
baseurl=https://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/
https://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/
https://mirrors.cloud.aliyuncs.com/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: base extras updates
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
^Chttps://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 12] Timeout on https://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 48354 milliseconds')
Trying other mirror.
^Chttps://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
Trying other mirror.
^Chttps://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
Trying other mirror.
^Chttps://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
Trying other mirror.
One of the configured repositories failed (CentOS-7 - Base - mirrors.aliyun.com),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo=base ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable base
or
subscription-manager repos --disable=base
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=base.skip_if_unavailable=true
failure: repodata/repomd.xml from base: [Errno 256] No more mirrors to try.
https://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno 12] Timeout on https://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: (28, 'Resolving timed out after 48354 milliseconds')
https://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
https://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
https://mirrors.aliyun.com/centos/7/os/x86_64/repodata/repomd.xml: [Errno -1] Error importing repomd.xml for base: Damaged repomd.xml file
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# rm -f CentOS-Base.repo
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# tar xf local.tar.gz
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: local
Cleaning up list of fastest mirrors
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
local | 3.6 kB 00:00:00
(1/4): local/group_gz | 153 kB 00:00:00
(2/4): local/primary_db | 3.3 MB 00:00:00
(3/4): local/filelists_db | 3.3 MB 00:00:00
(4/4): local/other_db | 1.3 MB 00:00:00
Metadata Cache Created
[root@centos7 yum.repos.d]# yum install bash-completion vim net-tools nepdate -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
No package nepdate available.
Resolving Dependencies
--> Running transaction check
---> Package bash-completion.noarch 1:2.1-8.el7 will be installed
---> Package net-tools.x86_64 0:2.0-0.25.20131004git.el7 will be installed
---> Package vim-enhanced.x86_64 2:7.4.629-7.el7 will be installed
--> Processing Dependency: vim-common = 2:7.4.629-7.el7 for package: 2:vim-enhanced-7.4.629-7.el7.x86_64
--> Processing Dependency: libgpm.so.2()(64bit) for package: 2:vim-enhanced-7.4.629-7.el7.x86_64
--> Running transaction check
---> Package gpm-libs.x86_64 0:1.20.7-6.el7 will be installed
---> Package vim-common.x86_64 2:7.4.629-7.el7 will be installed
--> Processing Dependency: vim-filesystem for package: 2:vim-common-7.4.629-7.el7.x86_64
--> Running transaction check
---> Package vim-filesystem.x86_64 2:7.4.629-7.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
===================================================================================================================================================
Package Arch Version Repository Size
===================================================================================================================================================
Installing:
bash-completion noarch 1:2.1-8.el7 local 87 k
net-tools x86_64 2.0-0.25.20131004git.el7 local 306 k
vim-enhanced x86_64 2:7.4.629-7.el7 local 1.1 M
Installing for dependencies:
gpm-libs x86_64 1.20.7-6.el7 local 32 k
vim-common x86_64 2:7.4.629-7.el7 local 5.9 M
vim-filesystem x86_64 2:7.4.629-7.el7 local 11 k
Transaction Summary
===================================================================================================================================================
Install 3 Packages (+3 Dependent packages)
Total download size: 7.4 M
Installed size: 25 M
Downloading packages:
---------------------------------------------------------------------------------------------------------------------------------------------------
Total 5.3 MB/s | 7.4 MB 00:00:01
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : gpm-libs-1.20.7-6.el7.x86_64 1/6
Installing : 2:vim-filesystem-7.4.629-7.el7.x86_64 2/6
Installing : 2:vim-common-7.4.629-7.el7.x86_64 3/6
Installing : 2:vim-enhanced-7.4.629-7.el7.x86_64 4/6
Installing : net-tools-2.0-0.25.20131004git.el7.x86_64 5/6
Installing : 1:bash-completion-2.1-8.el7.noarch 6/6
Verifying : 2:vim-common-7.4.629-7.el7.x86_64 1/6
Verifying : 2:vim-filesystem-7.4.629-7.el7.x86_64 2/6
Verifying : 1:bash-completion-2.1-8.el7.noarch 3/6
Verifying : net-tools-2.0-0.25.20131004git.el7.x86_64 4/6
Verifying : gpm-libs-1.20.7-6.el7.x86_64 5/6
Verifying : 2:vim-enhanced-7.4.629-7.el7.x86_64 6/6
Installed:
bash-completion.noarch 1:2.1-8.el7 net-tools.x86_64 0:2.0-0.25.20131004git.el7 vim-enhanced.x86_64 2:7.4.629-7.el7
Dependency Installed:
gpm-libs.x86_64 0:1.20.7-6.el7 vim-common.x86_64 2:7.4.629-7.el7 vim-filesystem.x86_64 2:7.4.629-7.el7
Complete!
[root@centos7 yum.repos.d]# ntpdate 120.25.108.11
-bash: ntpdate: command not found
[root@centos7 yum.repos.d]# yum install ntpdate -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package ntpdate.x86_64 0:4.2.6p5-29.el7.centos.2 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
===================================================================================================================================================
Package Arch Version Repository Size
===================================================================================================================================================
Installing:
ntpdate x86_64 4.2.6p5-29.el7.centos.2 local 87 k
Transaction Summary
===================================================================================================================================================
Install 1 Package
Total download size: 87 k
Installed size: 121 k
Downloading packages:
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : ntpdate-4.2.6p5-29.el7.centos.2.x86_64 1/1
Verifying : ntpdate-4.2.6p5-29.el7.centos.2.x86_64 1/1
Installed:
ntpdate.x86_64 0:4.2.6p5-29.el7.centos.2
Complete!
[root@centos7 yum.repos.d]# ntpdate 120.25.108.11
9 Jul 00:35:35 ntpdate[17012]: no server suitable for synchronization found
[root@centos7 yum.repos.d]# ntpdate
9 Jul 00:35:46 ntpdate[17125]: no servers can be used, exiting
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# rm local.repo
rm: remove regular file 'local.repo'?
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.repo local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# rm -f local.repo
[root@centos7 yum.repos.d]# ls
CentOS-Base.repo.backup local.tar.gz repo.tar.gz
[root@centos7 yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
--2025-07-09 00:46:06-- https://mirrors.aliyun.com/repo/Centos-7.repo
Resolving mirrors.aliyun.com (mirrors.aliyun.com)... 36.249.88.86, 36.250.15.228, 36.250.15.232, ...
Connecting to mirrors.aliyun.com (mirrors.aliyun.com)|36.249.88.86|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2523 (2.5K) [application/octet-stream]
Saving to: '/etc/yum.repos.d/CentOS-Base.repo'
100%[=========================================================================================================>] 2,523 --.-K/s in 0s
2025-07-09 00:46:06 (145 MB/s) - '/etc/yum.repos.d/CentOS-Base.repo' saved [2523/2523]
[root@centos7 yum.repos.d]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: base extras updates
Cleaning up list of fastest mirrors
Other repos take up 51 M of disk space (use --verbose for details)
[root@centos7 yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
base | 3.6 kB 00:00:00
extras | 2.9 kB 00:00:00
updates | 2.9 kB 00:00:00
(1/10): extras/7/x86_64/filelists_db | 305 kB 00:00:00
(2/10): extras/7/x86_64/primary_db | 253 kB 00:00:00
(3/10): extras/7/x86_64/other_db | 154 kB 00:00:00
(4/10): base/7/x86_64/group_gz | 153 kB 00:00:00
(5/10): base/7/x86_64/other_db | 2.6 MB 00:00:00
(6/10): updates/7/x86_64/other_db | 1.6 MB 00:00:00
(7/10): updates/7/x86_64/filelists_db | 15 MB 00:00:01
base/7/x86_64/primary_db FAILED
http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/6d0c3a488c282fe537794b5946b01e28c7f44db79097bb06826e1c0c88bad5ef-primary.sqlite.bz2: [Errno 14] curl#7 - "Failed connect to mirrors.cloud.aliyuncs.com:80; Connection refused"
Trying other mirror.
base/7/x86_64/filelists_db FAILED ===== ] 267 kB/s | 25 MB 00:02:16 ETA
http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/d6d94c7d406fe7ad4902a97104b39a0d8299451832a97f31d71653ba982c955b-filelists.sqlite.bz2: [Errno 14] curl#7 - "Failed connect to mirrors.aliyuncs.com:80; Connection refused"
Trying other mirror.
(8/10): base/7/x86_64/primary_db | 6.1 MB 00:00:00
(9/10): base/7/x86_64/filelists_db | 7.2 MB 00:00:00
updates/7/x86_64/primary_db FAILED
http://mirrors.aliyuncs.com/centos/7/updates/x86_64/repodata/f19044932626155f0cd849e88972b84875fc85e3308b4d622844a911c4ef54d0-primary.sqlite.bz2: [Errno 14] curl#7 - "Failed connect to mirrors.aliyuncs.com:80; Connection refused"
Trying other mirror.
(10/10): updates/7/x86_64/primary_db | 27 MB 00:00:01
Metadata Cache Created
[root@centos7 yum.repos.d]# yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
repo id repo name status
!base/7/x86_64 CentOS-7 - Base - mirrors.aliyun.com 10,072
!extras/7/x86_64 CentOS-7 - Extras - mirrors.aliyun.com 526
!updates/7/x86_64 CentOS-7 - Updates - mirrors.aliyun.com 6,173
repolist: 16,771
[root@centos7 yum.repos.d]# ping 120.25.108.11
PING 120.25.108.11 (120.25.108.11) 56(84) bytes of data.
^C
--- 120.25.108.11 ping statistics ---
14 packets transmitted, 0 received, 100% packet loss, time 13003ms
[root@centos7 yum.repos.d]# ping www.baidu.com
PING www.wshifen.com (103.235.46.115) 56(84) bytes of data.
64 bytes from 103.235.46.115 (103.235.46.115): icmp_seq=1 ttl=128 time=113 ms
64 bytes from 103.235.46.115 (103.235.46.115): icmp_seq=2 ttl=128 time=116 ms
^C
--- www.wshifen.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 113.805/114.918/116.032/1.163 ms
[root@centos7 yum.repos.d]# ping 120.25.108.11
PING 120.25.108.11 (120.25.108.11) 56(84) bytes of data.
^C
--- 120.25.108.11 ping statistics ---
17 packets transmitted, 0 received, 100% packet loss, time 16008ms
[root@centos7 yum.repos.d]# ntpdate ntp.aliyun.com
9 Jul 20:58:52 ntpdate[27920]: adjust time server 203.107.6.88 offset -0.317821 sec
[root@centos7 yum.repos.d]# shutdown
Shutdown scheduled for Wed 2025-07-09 21:01:45 CST, use 'shutdown -c' to cancel.
[root@centos7 yum.repos.d]#
Broadcast message from root@centos7.cn (Wed 2025-07-09 21:00:45 CST):
The system is going down for power-off at Wed 2025-07-09 21:01:45 CST!
Remote side unexpectedly closed network connection
───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
Session stopped
- Press to exit tab
- Press R to restart session
- Press S to save terminal output to file
root@192.168.235.130's password:
┌────────────────────────────────────────────────────────────────────┐
│ • MobaXterm 20.0 • │
│ (SSH client, X-server and networking tools) │
│ │
│ ➤ SSH session to root@192.168.235.130 │
│ • SSH compression : ✘ │
│ • SSH-browser : ✔ │
│ • X11-forwarding : ✘ (disabled or not supported by server) │
│ • DISPLAY : 192.168.1.171:0.0 │
│ │
│ ➤ For more info, ctrl+click on help or visit our website │
└────────────────────────────────────────────────────────────────────┘
Last login: Wed Jul 9 21:04:21 2025
[root@centos7 ~]# hostname
centos7.cn
[root@centos7 ~]# hostnamectl set-hostname mysql.cn
[root@centos7 ~]# hostname
mysql.cn
[root@centos7 ~]# systemctl restart network
[root@centos7 ~]# yum install libaio -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
base | 3.6 kB 00:00:00
extras | 2.9 kB 00:00:00
updates | 2.9 kB 00:00:00
Package libaio-0.3.109-13.el7.x86_64 already installed and latest version
Nothing to do
[root@centos7 ~]# tar -xf mysql-8.0.42-linux-glibc2.28-x86_64.tar.xz
[root@centos7 ~]# ls mysql-8.0.42-linux-glibc2.28-x86_64
bin docs include lib LICENSE man README share support-files
[root@centos7 ~]# useradd -r -s /sbin/nologin mysql
[root@centos7 ~]# id mysql
uid=998(mysql) gid=996(mysql) groups=996(mysql)
[root@centos7 ~]# rm -rf /etc/my.cnf
[root@centos7 ~]# mv mysql-8.0.42-linux-glibc2.28-x86_64 /mysql_3306
[root@centos7 ~]# cd /mysql_3306/
[root@centos7 mysql_3306]# mkdir mysql-files
[root@centos7 mysql_3306]# ls
bin docs include lib LICENSE man mysql-files README share support-files
[root@centos7 mysql_3306]# ls -l
total 268
drwxr-xr-x 2 7161 31415 4096 Mar 31 18:14 bin
drwxr-xr-x 2 7161 31415 38 Mar 31 18:14 docs
drwxr-xr-x 3 7161 31415 282 Mar 31 18:14 include
drwxr-xr-x 6 7161 31415 201 Mar 31 18:14 lib
-rw-r--r-- 1 7161 31415 259904 Mar 31 16:19 LICENSE
drwxr-xr-x 4 7161 31415 30 Mar 31 18:14 man
drwxr-xr-x 2 root root 6 Jul 9 21:25 mysql-files
-rw-r--r-- 1 7161 31415 666 Mar 31 16:19 README
drwxr-xr-x 28 7161 31415 4096 Mar 31 18:14 share
drwxr-xr-x 2 7161 31415 77 Mar 31 18:14 support-files
[root@centos7 mysql_3306]# chown mysql:mysql mysql-files
[root@centos7 mysql_3306]# chmod 750 mysql-files/
[root@centos7 mysql_3306]# bin/mysqld --initialize --user=mysql --basedir=/mysql_3306
bin/mysqld: /lib64/libstdc++.so.6: version `CXXABI_1.3.11' not found (required by bin/mysqld)
bin/mysqld: /lib64/libstdc++.so.6: version `CXXABI_1.3.8' not found (required by bin/mysqld)
bin/mysqld: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.22' not found (required by bin/mysqld)
bin/mysqld: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by bin/mysqld)
bin/mysqld: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by bin/mysqld)
bin/mysqld: /lib64/libstdc++.so.6: version `CXXABI_1.3.9' not found (required by bin/mysqld)
bin/mysqld: /lib64/libm.so.6: version `GLIBC_2.27' not found (required by bin/mysqld)
bin/mysqld: /lib64/libc.so.6: version `GLIBC_2.28' not found (required by bin/mysqld)
bin/mysqld: /lib64/libc.so.6: version `GLIBC_2.25' not found (required by /mysql_3306/bin/../lib/private/libcrypto.so.3)
bin/mysqld: /lib64/libc.so.6: version `GLIBC_2.28' not found (required by /mysql_3306/bin/../lib/private/libprotobuf-lite.so.24.4.0)
bin/mysqld: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by /mysql_3306/bin/../lib/private/libprotobuf-lite.so.24.4.0)
bin/mysqld: /lib64/libstdc++.so.6: version `CXXABI_1.3.9' not found (required by /mysql_3306/bin/../lib/private/libprotobuf-lite.so.24.4.0)
bin/mysqld: /lib64/libstdc++.so.6: version `CXXABI_1.3.8' not found (required by /mysql_3306/bin/../lib/private/libprotobuf-lite.so.24.4.0)
bin/mysqld: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by /mysql_3306/bin/../lib/private/libprotobuf-lite.so.24.4.0)
[root@centos7 mysql_3306]# ntpdate
9 Jul 21:28:36 ntpdate[10071]: no servers can be used, exiting
[root@centos7 mysql_3306]# which ntpdate
/usr/sbin/ntpdate
[root@centos7 mysql_3306]# bin/mysqld --initialize --user=mysql --basedir=/mysql_3306
bin/mysqld: /lib64/libstdc++.so.6: version `CXXABI_1.3.11' not found (required by bin/mysqld)
bin/mysqld: /lib64/libstdc++.so.6: version `CXXABI_1.3.8' not found (required by bin/mysqld)
bin/mysqld: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.22' not found (required by bin/mysqld)
bin/mysqld: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by bin/mysqld)
bin/mysqld: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by bin/mysqld)
bin/mysqld: /lib64/libstdc++.so.6: version `CXXABI_1.3.9' not found (required by bin/mysqld)
bin/mysqld: /lib64/libm.so.6: version `GLIBC_2.27' not found (required by bin/mysqld)
bin/mysqld: /lib64/libc.so.6: version `GLIBC_2.28' not found (required by bin/mysqld)
bin/mysqld: /lib64/libc.so.6: version `GLIBC_2.25' not found (required by /mysql_3306/bin/../lib/private/libcrypto.so.3)
bin/mysqld: /lib64/libc.so.6: version `GLIBC_2.28' not found (required by /mysql_3306/bin/../lib/private/libprotobuf-lite.so.24.4.0)
bin/mysqld: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by /mysql_3306/bin/../lib/private/libprotobuf-lite.so.24.4.0)
bin/mysqld: /lib64/libstdc++.so.6: version `CXXABI_1.3.9' not found (required by /mysql_3306/bin/../lib/private/libprotobuf-lite.so.24.4.0)
bin/mysqld: /lib64/libstdc++.so.6: version `CXXABI_1.3.8' not found (required by /mysql_3306/bin/../lib/private/libprotobuf-lite.so.24.4.0)
bin/mysqld: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by /mysql_3306/bin/../lib/private/libprotobuf-lite.so.24.4.0)
[root@centos7 mysql_3306]# yum install centos-release-scl -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
Resolving Dependencies
--> Running transaction check
---> Package centos-release-scl.noarch 0:2-3.el7.centos will be installed
--> Processing Dependency: centos-release-scl-rh for package: centos-release-scl-2-3.el7.centos.noarch
--> Running transaction check
---> Package centos-release-scl-rh.noarch 0:2-3.el7.centos will be installed
--> Finished Dependency Resolution
Dependencies Resolved
===================================================================================================================================================
Package Arch Version Repository Size
===================================================================================================================================================
Installing:
centos-release-scl noarch 2-3.el7.centos extras 12 k
Installing for dependencies:
centos-release-scl-rh noarch 2-3.el7.centos extras 12 k
Transaction Summary
===================================================================================================================================================
Install 1 Package (+1 Dependent package)
Total download size: 24 k
Installed size: 39 k
Downloading packages:
warning: /var/cache/yum/x86_64/7/extras/packages/centos-release-scl-2-3.el7.centos.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Public key for centos-release-scl-2-3.el7.centos.noarch.rpm is not installed
(1/2): centos-release-scl-2-3.el7.centos.noarch.rpm | 12 kB 00:00:10
(2/2): centos-release-scl-rh-2-3.el7.centos.noarch.rpm | 12 kB 00:00:10
---------------------------------------------------------------------------------------------------------------------------------------------------
Total 2.3 kB/s | 24 kB 00:00:10
Retrieving key from http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
Importing GPG key 0xF4A80EB5:
Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) "
Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
From : http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : centos-release-scl-rh-2-3.el7.centos.noarch 1/2
Installing : centos-release-scl-2-3.el7.centos.noarch 2/2
Verifying : centos-release-scl-2-3.el7.centos.noarch 1/2
Verifying : centos-release-scl-rh-2-3.el7.centos.noarch 2/2
Installed:
centos-release-scl.noarch 0:2-3.el7.centos
Dependency Installed:
centos-release-scl-rh.noarch 0:2-3.el7.centos
Complete!
[root@centos7 mysql_3306]# yum install devtoolset-9 -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Could not retrieve mirrorlist http://mirrorlist.centos.org?arch=x86_64&release=7&repo=sclo-rh error was
14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"
One of the configured repositories failed (Unknown),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:
1. Contact the upstream for the repository and get them to fix the problem.
2. Reconfigure the baseurl/etc. for the repository, to point to a working
upstream. This is most often useful if you are using a newer
distribution release than is supported by the repository (and the
packages for the previous distribution release still work).
3. Run the command with the repository temporarily disabled
yum --disablerepo= ...
4. Disable the repository permanently, so yum won't use it by default. Yum
will then just ignore the repository until you permanently enable it
again or use --enablerepo for temporary usage:
yum-config-manager --disable
or
subscription-manager repos --disable=
5. Configure the failing repository to be skipped, if it is unavailable.
Note that yum will try to contact the repo. when it runs most commands,
so will have to try and fail each time (and thus. yum will be be much
slower). If it is a very temporary problem though, this is often a nice
compromise:
yum-config-manager --save --setopt=.skip_if_unavailable=true
Cannot find a valid baseurl for repo: centos-sclo-rh/x86_64
[root@centos7 mysql_3306]# cat /etc/resolv.conf
# Generated by NetworkManager
search cn
nameserver 8.8.8.8
nameserver 119.29.29.29
[root@centos7 mysql_3306]# vim /etc/resolv.conf
[root@centos7 mysql_3306]# cat /etc/resolv.conf
# Generated by NetworkManager
search cn
nameserver 8.8.8.8
nameserver 119.29.29.29
nameserver 223.5.5.5
[root@centos7 mysql_3306]# ping mirrorlist.centos.org
ping: mirrorlist.centos.org: Name or service not known
[root@centos7 mysql_3306]# systemctl restart network
[root@centos7 mysql_3306]# ping mirrorlist.centos.org
ping: mirrorlist.centos.org: Name or service not known
[root@centos7 mysql_3306]# ls
bin docs include lib LICENSE man mysql-files README share support-files
[root@centos7 mysql_3306]# cd /
[root@centos7 /]# ls
bin boot dev etc home lib lib64 media mnt mysql_3306 opt proc root run sbin srv sys tmp usr var
[root@centos7 /]# cd ~
[root@centos7 ~]# ls
anaconda-ks.cfg mysql-5.7.31-linux-glibc2.12-x86_64.tar.gz mysql-8.0.42-linux-glibc2.28-x86_64.tar.xz
[root@centos7 ~]# tar xf mysql-5.7.31-linux-glibc2.12-x86_64.tar.gz
[root@centos7 ~]# rm -f /mysql_3306/
rm: cannot remove '/mysql_3306/': Is a directory
[root@centos7 ~]# rm -f /mysql_3306/
rm: cannot remove '/mysql_3306/': Is a directory
[root@centos7 ~]# rm -f /m
media/ mnt/ mysql_3306/
[root@centos7 ~]# rm -f /mysql_3306
rm: cannot remove '/mysql_3306': Is a directory
[root@centos7 ~]# rm -rf /mysql_3306/
[root@centos7 ~]# mv mysql-5.7.31-linux-glibc2.12-x86_64 /mysql_3306
[root@centos7 ~]# cd /mysql_3306/
[root@centos7 mysql_3306]# cd ~
[root@centos7 ~]# ls
anaconda-ks.cfg mysql-5.7.31-linux-glibc2.12-x86_64.tar.gz mysql-8.0.42-linux-glibc2.28-x86_64.tar.xz
[root@centos7 ~]# cd mysql-files
-bash: cd: mysql-files: No such file or directory
[root@centos7 ~]# ls
anaconda-ks.cfg mysql-5.7.31-linux-glibc2.12-x86_64.tar.gz mysql-8.0.42-linux-glibc2.28-x86_64.tar.xz
[root@centos7 ~]# cd /mysql_3306/
[root@centos7 mysql_3306]# ls
bin docs include lib LICENSE man README share support-files
[root@centos7 mysql_3306]# mkdir mysql-files
[root@centos7 mysql_3306]# chown mysql.mysql mysql-files
[root@centos7 mysql_3306]# ls -l mysql-files/
total 0
[root@centos7 mysql_3306]# ls -l
total 288
drwxr-xr-x 2 7161 31415 4096 Jun 2 2020 bin
drwxr-xr-x 2 7161 31415 55 Jun 2 2020 docs
drwxr-xr-x 3 7161 31415 4096 Jun 2 2020 include
drwxr-xr-x 5 7161 31415 205 Jun 2 2020 lib
-rw-r--r-- 1 7161 31415 275393 Jun 2 2020 LICENSE
drwxr-xr-x 4 7161 31415 30 Jun 2 2020 man
drwxr-xr-x 2 mysql mysql 6 Jul 9 22:06 mysql-files
-rw-r--r-- 1 7161 31415 587 Jun 2 2020 README
drwxr-xr-x 28 7161 31415 4096 Jun 2 2020 share
drwxr-xr-x 2 7161 31415 90 Jun 2 2020 support-files
[root@centos7 mysql_3306]# chmod 750 mysql-files
[root@centos7 mysql_3306]# ll -d mysql-files/
drwxr-x--- 2 mysql mysql 6 Jul 9 22:06 mysql-files/
[root@centos7 mysql_3306]# ls
bin docs include lib LICENSE man mysql-files README share support-files
[root@centos7 mysql_3306]# bin/mysqld --initialize --user=mysql --basedir=/mysql_3306
2025-07-09T14:09:48.646845Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2025-07-09T14:09:48.822750Z 0 [Warning] InnoDB: New log files created, LSN=45790
2025-07-09T14:09:48.847729Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2025-07-09T14:09:48.901190Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 5fd0a076-5cce-11f0-8e1c-000c29815f4b.
2025-07-09T14:09:48.901822Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2025-07-09T14:09:49.276289Z 0 [Warning] CA certificate ca.pem is self signed.
2025-07-09T14:09:49.305643Z 1 [Note] A temporary password is generated for root@localhost: 0u#c+s4iWi7u
[root@centos7 mysql_3306]# ls
bin data docs include lib LICENSE man mysql-files README share support-files
[root@centos7 mysql_3306]# ls data
auto.cnf ca.pem client-key.pem ibdata1 ib_logfile1 performance_schema public_key.pem server-key.pem
ca-key.pem client-cert.pem ib_buffer_pool ib_logfile0 mysql private_key.pem server-cert.pem sys
[root@centos7 mysql_3306]# bin/mysql_ssl_rsa_setup --datadir=/mysql_3306/data
[root@centos7 mysql_3306]# cp support-files/mysql.server /etc/init.d/mysql_3306
[root@centos7 mysql_3306]# vim /etc/init.d/mysql_3306
[root@centos7 mysql_3306]# cat /etc/init.d/mysql_3306
#!/bin/sh
# Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
# This file is public domain and comes with NO WARRANTY of any kind
# MySQL daemon start/stop script.
# Usually this is put in /etc/init.d (at least on machines SYSV R4 based
# systems) and linked to /etc/rc3.d/S99mysql and /etc/rc0.d/K01mysql.
# When this is done the mysql server will be started when the machine is
# started and shut down when the systems goes down.
# Comments to support chkconfig on RedHat Linux
# chkconfig: 2345 64 36
# description: A very fast and reliable SQL database engine.
# Comments to support LSB init script conventions
### BEGIN INIT INFO
# Provides: mysql
# Required-Start: $local_fs $network $remote_fs
# Should-Start: ypbind nscd ldap ntpd xntpd
# Required-Stop: $local_fs $network $remote_fs
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: start and stop MySQL
# Description: MySQL is a very fast and reliable SQL database engine.
### END INIT INFO
# If you install MySQL on some other places than /usr/local/mysql, then you
# have to do one of the following things for this script to work:
#
# - Run this script from within the MySQL installation directory
# - Create a /etc/my.cnf file with the following information:
# [mysqld]
# basedir=
# - Add the above to any other configuration file (for example ~/.my.ini)
# and copy my_print_defaults to /usr/bin
# - Add the path to the mysql-installation-directory to the basedir variable
# below.
#
# If you want to affect other MySQL variables, you should make your changes
# in the /etc/my.cnf, ~/.my.cnf or other MySQL configuration files.
# If you change base dir, you must also change datadir. These may get
# overwritten by settings in the MySQL configuration files.
basedir=/mysql_3306
datadir=/mysql_3306/data
# Default value, in seconds, afterwhich the script should timeout waiting
# for server start.
# Value here is overriden by value in my.cnf.
# 0 means don't wait at all
# Negative numbers mean to wait indefinitely
service_startup_timeout=900
# Lock directory for RedHat / SuSE.
lockdir='/var/lock/subsys'
lock_file_path="$lockdir/mysql"
# The following variables are only set for letting mysql.server find things.
# Set some defaults
mysqld_pid_file_path=
if test -z "$basedir"
then
basedir=/usr/local/mysql
bindir=/usr/local/mysql/bin
if test -z "$datadir"
then
datadir=/usr/local/mysql/data
fi
sbindir=/usr/local/mysql/bin
libexecdir=/usr/local/mysql/bin
else
bindir="$basedir/bin"
if test -z "$datadir"
then
datadir="$basedir/data"
fi
sbindir="$basedir/sbin"
libexecdir="$basedir/libexec"
fi
# datadir_set is used to determine if datadir was set (and so should be
# *not* set inside of the --basedir= handler.)
datadir_set=
#
# Use LSB init script functions for printing messages, if possible
#
lsb_functions="/lib/lsb/init-functions"
if test -f $lsb_functions ; then
. $lsb_functions
else
log_success_msg()
{
echo " SUCCESS! $@"
}
log_failure_msg()
{
echo " ERROR! $@"
}
fi
PATH="/sbin:/usr/sbin:/bin:/usr/bin:$basedir/bin"
export PATH
mode=$1 # start or stop
[ $# -ge 1 ] && shift
other_args="$*" # uncommon, but needed when called from an RPM upgrade action
# Expected: "--skip-networking --skip-grant-tables"
# They are not checked here, intentionally, as it is the resposibility
# of the "spec" file author to give correct arguments only.
case `echo "testing\c"`,`echo -n testing` in
*c*,-n*) echo_n= echo_c= ;;
*c*,*) echo_n=-n echo_c= ;;
*) echo_n= echo_c='\c' ;;
esac
parse_server_arguments() {
for arg do
case "$arg" in
--basedir=*) basedir=`echo "$arg" | sed -e 's/^[^=]*=//'`
bindir="$basedir/bin"
if test -z "$datadir_set"; then
datadir="$basedir/data"
fi
sbindir="$basedir/sbin"
libexecdir="$basedir/libexec"
;;
--datadir=*) datadir=`echo "$arg" | sed -e 's/^[^=]*=//'`
datadir_set=1
;;
--pid-file=*) mysqld_pid_file_path=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
--service-startup-timeout=*) service_startup_timeout=`echo "$arg" | sed -e 's/^[^=]*=//'` ;;
esac
done
}
wait_for_pid () {
verb="$1" # created | removed
pid="$2" # process ID of the program operating on the pid-file
pid_file_path="$3" # path to the PID file.
i=0
avoid_race_condition="by checking again"
while test $i -ne $service_startup_timeout ; do
case "$verb" in
'created')
# wait for a PID-file to pop into existence.
test -s "$pid_file_path" && i='' && break
;;
'removed')
# wait for this PID-file to disappear
test ! -s "$pid_file_path" && i='' && break
;;
*)
echo "wait_for_pid () usage: wait_for_pid created|removed pid pid_file_path"
exit 1
;;
esac
# if server isn't running, then pid-file will never be updated
if test -n "$pid"; then
if kill -0 "$pid" 2>/dev/null; then
: # the server still runs
else
# The server may have exited between the last pid-file check and now.
if test -n "$avoid_race_condition"; then
avoid_race_condition=""
continue # Check again.
fi
# there's nothing that will affect the file.
log_failure_msg "The server quit without updating PID file ($pid_file_path)."
return 1 # not waiting any more.
fi
fi
echo $echo_n ".$echo_c"
i=`expr $i + 1`
sleep 1
done
if test -z "$i" ; then
log_success_msg
return 0
else
log_failure_msg
return 1
fi
}
# Get arguments from the my.cnf file,
# the only group, which is read from now on is [mysqld]
if test -x "$bindir/my_print_defaults"; then
print_defaults="$bindir/my_print_defaults"
else
# Try to find basedir in /etc/my.cnf
conf=/etc/my.cnf
print_defaults=
if test -r $conf
then
subpat='^[^=]*basedir[^=]*=\(.*\)$'
dirs=`sed -e "/$subpat/!d" -e 's//\1/' $conf`
for d in $dirs
do
d=`echo $d | sed -e 's/[ ]//g'`
if test -x "$d/bin/my_print_defaults"
then
print_defaults="$d/bin/my_print_defaults"
break
fi
done
fi
# Hope it's in the PATH ... but I doubt it
test -z "$print_defaults" && print_defaults="my_print_defaults"
fi
#
# Read defaults file from 'basedir'. If there is no defaults file there
# check if it's in the old (depricated) place (datadir) and read it from there
#
extra_args=""
if test -r "$basedir/my.cnf"
then
extra_args="-e $basedir/my.cnf"
fi
parse_server_arguments `$print_defaults $extra_args mysqld server mysql_server mysql.server`
#
# Set pid file if not given
#
if test -z "$mysqld_pid_file_path"
then
mysqld_pid_file_path=$datadir/`hostname`.pid
else
case "$mysqld_pid_file_path" in
/* ) ;;
* ) mysqld_pid_file_path="$datadir/$mysqld_pid_file_path" ;;
esac
fi
case "$mode" in
'start')
# Start daemon
# Safeguard (relative paths, core dumps..)
cd $basedir
echo $echo_n "Starting MySQL"
if test -x $bindir/mysqld_safe
then
# Give extra arguments to mysqld with the my.cnf file. This script
# may be overwritten at next upgrade.
$bindir/mysqld_safe --datadir="$datadir" --pid-file="$mysqld_pid_file_path" $other_args >/dev/null &
wait_for_pid created "$!" "$mysqld_pid_file_path"; return_value=$?
# Make lock for RedHat / SuSE
if test -w "$lockdir"
then
touch "$lock_file_path"
fi
exit $return_value
else
log_failure_msg "Couldn't find MySQL server ($bindir/mysqld_safe)"
fi
;;
'stop')
# Stop daemon. We use a signal here to avoid having to know the
# root password.
if test -s "$mysqld_pid_file_path"
then
# signal mysqld_safe that it needs to stop
touch "$mysqld_pid_file_path.shutdown"
mysqld_pid=`cat "$mysqld_pid_file_path"`
if (kill -0 $mysqld_pid 2>/dev/null)
then
echo $echo_n "Shutting down MySQL"
kill $mysqld_pid
# mysqld should remove the pid file when it exits, so wait for it.
wait_for_pid removed "$mysqld_pid" "$mysqld_pid_file_path"; return_value=$?
else
log_failure_msg "MySQL server process #$mysqld_pid is not running!"
rm "$mysqld_pid_file_path"
fi
# Delete lock for RedHat / SuSE
if test -f "$lock_file_path"
then
rm -f "$lock_file_path"
fi
exit $return_value
else
log_failure_msg "MySQL server PID file could not be found!"
fi
;;
'restart')
# Stop the service and regardless of whether it was
# running or not, start it again.
if $0 stop $other_args; then
$0 start $other_args
else
log_failure_msg "Failed to stop running server, so refusing to try to start."
exit 1
fi
;;
'reload'|'force-reload')
if test -s "$mysqld_pid_file_path" ; then
read mysqld_pid < "$mysqld_pid_file_path"
kill -HUP $mysqld_pid && log_success_msg "Reloading service MySQL"
touch "$mysqld_pid_file_path"
else
log_failure_msg "MySQL PID file could not be found!"
exit 1
fi
;;
'status')
# First, check to see if pid file exists
if test -s "$mysqld_pid_file_path" ; then
read mysqld_pid < "$mysqld_pid_file_path"
if kill -0 $mysqld_pid 2>/dev/null ; then
log_success_msg "MySQL running ($mysqld_pid)"
exit 0
else
log_failure_msg "MySQL is not running, but PID file exists"
exit 1
fi
else
# Try to find appropriate mysqld process
mysqld_pid=`pidof $libexecdir/mysqld`
# test if multiple pids exist
pid_count=`echo $mysqld_pid | wc -w`
if test $pid_count -gt 1 ; then
log_failure_msg "Multiple MySQL running but PID file could not be found ($mysqld_pid)"
exit 5
elif test -z $mysqld_pid ; then
if test -f "$lock_file_path" ; then
log_failure_msg "MySQL is not running, but lock file ($lock_file_path) exists"
exit 2
fi
log_failure_msg "MySQL is not running"
exit 3
else
log_failure_msg "MySQL is running but PID file could not be found"
exit 4
fi
fi
;;
*)
# usage
basename=`basename "$0"`
echo "Usage: $basename {start|stop|restart|reload|force-reload|status} [ MySQL server options ]"
exit 1
;;
esac
exit 0
[root@centos7 mysql_3306]# service mysql_3306 start
Starting MySQL.Logging to '/mysql_3306/data/mysql.cn.err'.
SUCCESS!
[root@centos7 mysql_3306]# bin/mysqladmin -uroot password '123' -p
Enter password:
mysqladmin: [Warning] Using a password on the command line interface can be insecure.
Warning: Since password will be sent to server in plain text, use ssl connection to ensure password safety.
[root@centos7 mysql_3306]# chkconfig --list
Note: This output shows SysV services only and does not include native
systemd services. SysV configuration data might be overridden by native
systemd configuration.
If you want to list systemd services use 'systemctl list-unit-files'.
To see services enabled on particular target use
'systemctl list-dependencies [target]'.
netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
[root@centos7 mysql_3306]# chkconfig --add mysql_3306
[root@centos7 mysql_3306]# chkconfig --list
Note: This output shows SysV services only and does not include native
systemd services. SysV configuration data might be overridden by native
systemd configuration.
If you want to list systemd services use 'systemctl list-unit-files'.
To see services enabled on particular target use
'systemctl list-dependencies [target]'.
mysql_3306 0:off 1:off 2:on 3:on 4:on 5:on 6:off
netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
[root@centos7 mysql_3306]# chkconfig mysql_3306 on
[root@centos7 mysql_3306]# ls
bin data docs include lib LICENSE man mysql-files README share support-files
[root@centos7 mysql_3306]# chkconfig -list
-list: unknown option
[root@centos7 mysql_3306]# chkconfig --list
Note: This output shows SysV services only and does not include native
systemd services. SysV configuration data might be overridden by native
systemd configuration.
If you want to list systemd services use 'systemctl list-unit-files'.
To see services enabled on particular target use
'systemctl list-dependencies [target]'.
mysql_3306 0:off 1:off 2:on 3:on 4:on 5:on 6:off
netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
[root@centos7 mysql_3306]# echo 'export PATH=$PATH:/mysql_3306/bin'>>/etc/profile
[root@centos7 mysql_3306]# source /etc/profile
[root@centos7 mysql_3306]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.31 MySQL Community Server (GPL)
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> exit
Bye
[root@centos7 mysql_3306]# vim /mysql_3306/my.cnf
[root@centos7 mysql_3306]# cat /mysql_3306/my.cnf
[mysqld]
basedir=/mysql_3306
datadir=/mysql_3306/data
socket=/tmp/mysql.sock
[root@centos7 mysql_3306]# service mysql_3306 restart
Shutting down MySQL.. SUCCESS!
Starting MySQL. SUCCESS!
[root@centos7 mysql_3306]# mysql_secure_installation
Securing the MySQL server deployment.
Enter password for user root:
Error: Access denied for user 'root'@'localhost' (using password: NO)
[root@centos7 mysql_3306]#
[root@centos7 mysql_3306]# mysql_secure_installation
Securing the MySQL server deployment.
Enter password for user root:
VALIDATE PASSWORD PLUGIN can be used to test passwords
and improve security. It checks the strength of password
and allows the users to set only those passwords which are
secure enough. Would you like to setup VALIDATE PASSWORD plugin?
Press y|Y for Yes, any other key for No:
Using existing password for root.
Change the password for root ? ((Press y|Y for Yes, any other key for No) :
... skipping.
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL without having to have
a user account created for them. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.
Remove anonymous users? (Press y|Y for Yes, any other key for No) :
... skipping.
Normally, root should only be allowed to connect from
'localhost'. This ensures that someone cannot guess at
the root password from the network.
Disallow root login remotely? (Press y|Y for Yes, any other key for No) :
... skipping.
By default, MySQL comes with a database named 'test' that
anyone can access. This is also intended only for testing,
and should be removed before moving into a production
environment.
Remove test database and access to it? (Press y|Y for Yes, any other key for No) :
... skipping.
Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.
Reload privilege tables now? (Press y|Y for Yes, any other key for No) :
... skipping.
All done!
[root@centos7 mysql_3306]# vim /mysql_3306/my.cnf
[root@centos7 mysql_3306]# vim /mysql_3306/my.cnf
[root@centos7 mysql_3306]# cat /mysql_3306/my.cnf
[mysqld]
basedir=/mysql_3306
datadir=/mysql_3306/data
socket=/tmp/mysql.sock
validate_password=OFF
[root@centos7 mysql_3306]# service mysql_3306 restart
Shutting down MySQL.. SUCCESS!
Starting MySQL... ERROR! The server quit without updating PID file (/mysql_3306/data/mysql.cn.pid).
[root@centos7 mysql_3306]#
```