1.首先查看redhat7系统本身所安装的那些yum软件包

$root@linux \~$ # rpm -qa | grep yum

yum-utils-1.1.31-24.el7.noarch

yum-langpacks-0.4.2-3.el7.noarch

yum-metadata-parser-1.1.4-10.el7.x86_64

yum-rhn-plugin-2.0.1-4.el7.noarch

PackageKit-yum-0.8.9-11.el7.x86_64

yum-3.4.3-118.el7.noarch

(随版本更新名字可能会不一样)

2.删除redhat自带的yum包，卸载上面显示的所有yum包：

$root@localhost \~$ # rpm -qa|grep yum|xargs rpm -e --nodeps

$root@localhost \~$ # rpm -qa |grep yum

或者

rpm -e 包名 --nodeps

3.保证本机电脑能上网，ping一下

4.选择网络源

网易，阿里云都可以

网易：欢迎访问网易开源镜像站

阿里云：阿里巴巴开源镜像站-OPSX镜像站-阿里云开发者社区

5.下载安装包rpm

wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-168.el7.centos.noarch.rpm

wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm

wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-utils-1.1.31-54.el7_8.noarch.rpm

wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-updateonboot-1.1.31-54.el7_8.noarch.rpm

wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm

6.查看下载完成结果

$root@linux \~$ # ll

7.安装软件包

$root@linux \~$ # rpm -ivh yum-*

若安装失败出现以下

warning: package yum-metadata-parser-1.1.4-10.el7.x86_64 was already added, skipping yum-metadata-parser-1.1.4-10.el7.x86_64

error: Failed dependencies:

rpm >= 0:4.11.3-22 is needed by yum-3.4.3-168.el7.centos.noarch

则还需要下载rpm安装包更新一下版本

wget http://mirrors.163.com/centos/7/os/x86_64/Packages/rpm-4.11.3-45.el7.x86_64.rpm

下载之后先安装更新rpm包再安装软件包

8.新建repo配置文件,直接复制粘贴以下内容

$root@linux \~$ # vim /etc/yum.repos.d/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-$7 - Base - 163.com

#mirrorlist=http://mirrorlist.centos.org/?release=$7\&arch=$basearch\&repo=os

baseurl=http://mirrors.163.com/centos/7/os/$basearch/

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

#released updates

updates

name=CentOS-$7 - Updates - 163.com

#mirrorlist=http://mirrorlist.centos.org/?release=$7\&arch=$basearch\&repo=updates

baseurl=http://mirrors.163.com/centos/7/updates/$basearch/

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful

extras

name=CentOS-$7 - Extras - 163.com

#mirrorlist=http://mirrorlist.centos.org/?release=$7\&arch=$basearch\&repo=extras

baseurl=http://mirrors.163.com/centos/7/extras/$basearch/

gpgcheck=1

gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages

centosplus

name=CentOS-$7 - Plus - 163.com

baseurl=http://mirrors.163.com/centos/7/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

9.测试安装是否正常

$root@linux \~$ # yum -y install 包名

原文链接：https://blog.csdn.net/croft12138/article/details/130532149

配置Redhat7使用centos7 的yum源

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.