failed: Connection timed out.
c
wqbboy@wqbboy:/opt/mails$ wget https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
--2025-09-06 10:30:52-- https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Resolving github.com (github.com)... 20.205.243.166
Connecting to github.com (github.com)|20.205.243.166|:443... connected.
HTTP request sent, awaiting response... No data received.
Retrying.
--2025-09-06 10:32:55-- (try: 2) https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Connecting to github.com (github.com)|20.205.243.166|:443...
failed: Connection timed out.
Resolving github.com (github.com)... 20.205.243.166
Connecting to github.com (github.com)|20.205.243.166|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4 [following]
--2025-09-06 10:35:38-- https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4
Resolving codeload.github.com (codeload.github.com)... 20.205.243.165
Connecting to codeload.github.com (codeload.github.com)|20.205.243.165|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 250725 (245K) [application/x-gzip]
1.7.4.tar.gz: Permission denied
Cannot write to '1.7.4.tar.gz' (Success).
wqbboy@wqbboy:/opt/mails$
wqbboy@wqbboy:/opt/mails$ ls下面针对Ubuntu编译 Buildroot 时无法从 github 上下载各种 tar.gz 问题进行解决。
首先，我的Windows10是打开梯子的，可以看到系统代理端口信息如下：（注意！！！这里即使没有梯子也不会影响到后续的步骤，只是无法在浏览器中打开github相关的网页而已，这点并不影响）
点击如下链接GitHub.com - GitHub: Let's build from here · GitHub (ipaddress.com)查看github.com这个域名对应的IP地址，如下IP地址为140.82.114.3
Ubuntu虚拟机下关闭代理：
.
Ubuntu命令行下配置 git 不使用代理：
c
sudo git config --global -- unset http.proxy
sudo git config --global -- unset https.proxy将上面 github.com域名等效的IP地址配进我们的Ubuntu虚拟机 /etc/hosts文件中：
ping github.com
c
wqbboy@wqbboy:/opt/mails$ ping codeload.github.com
PING codeload.github.com (20.205.243.165) 56(84) bytes of data.
64 bytes from 20.205.243.165 (20.205.243.165): icmp_seq=1 ttl=111 time=182 ms
64 bytes from 20.205.243.165 (20.205.243.165): icmp_seq=2 ttl=111 time=71.3 ms
64 bytes from 20.205.243.165 (20.205.243.165): icmp_seq=3 ttl=111 time=70.6 ms
64 bytes from 20.205.243.165 (20.205.243.165): icmp_seq=4 ttl=111 time=70.8 ms
^C
--- codeload.github.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3035ms
rtt min/avg/max/mdev = 70.579/98.771/182.413/48.291 ms
wqbboy@wqbboy:/opt/mails$ wget http://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
URL transformed to HTTPS due to an HSTS policy
--2025-09-06 10:36:16-- https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Resolving github.com (github.com)... 20.205.243.166
Connecting to github.com (github.com)|20.205.243.166|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4 [following]
--2025-09-06 10:36:32-- https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4
Resolving codeload.github.com (codeload.github.com)... 20.205.243.165
Connecting to codeload.github.com (codeload.github.com)|20.205.243.165|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [application/x-gzip]
1.7.4.tar.gz: Permission denied
Cannot write to '1.7.4.tar.gz' (Success).在这里插入代码片
c
wqbboy@wqbboy:/opt/mails$ wget https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
--2025-09-06 10:37:03-- https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Resolving github.com (github.com)... 20.205.243.166
Connecting to github.com (github.com)|20.205.243.166|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4 [following]
--2025-09-06 10:37:04-- https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4
Resolving codeload.github.com (codeload.github.com)... 20.205.243.165
Connecting to codeload.github.com (codeload.github.com)|20.205.243.165|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 250725 (245K) [application/x-gzip]
1.7.4.tar.gz: Permission denied
Cannot write to '1.7.4.tar.gz' (Success).
wqbboy@wqbboy:/opt/mails$ ^C
wqbboy@wqbboy:/opt/mails$ Connecting to github.com (github.com)Connecting to github.com (github.com)
-bash: syntax error near unexpected token `('
wqbboy@wqbboy:/opt/mails$ sudo yum update nss
sudo: yum: command not found
wqbboy@wqbboy:/opt/mails$ sudo apt-get update nss
E: The update command takes no arguments
wqbboy@wqbboy:/opt/mails$ sudo apt-get update
Hit:1 http://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy InRelease
Hit:2 http://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-updates InRelease
Hit:3 http://mirrors.tuna.tsinghua.edu.cn/ubuntu jammy-backports InRelease
Hit:4 http://security.ubuntu.com/ubuntu jammy-security InRelease
Reading package lists... Done
wqbboy@wqbboy:/opt/mails$ wget https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
--2025-09-06 10:38:51-- https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Resolving github.com (github.com)... 20.205.243.166
Connecting to github.com (github.com)|20.205.243.166|:443... connected.
HTTP request sent, awaiting response... No data received.
Retrying.
--2025-09-06 10:40:22-- (try: 2) https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Connecting to github.com (github.com)|20.205.243.166|:443... connected.
HTTP request sent, awaiting response... No data received.
Retrying.
--2025-09-06 10:40:45-- (try: 3) https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Connecting to github.com (github.com)|20.205.243.166|:443... failed: Connection timed out.
Resolving github.com (github.com)... 20.205.243.166
Connecting to github.com (github.com)|20.205.243.166|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4 [following]
--2025-09-06 10:44:01-- https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4
Resolving codeload.github.com (codeload.github.com)... 20.205.243.165
Connecting to codeload.github.com (codeload.github.com)|20.205.243.165|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 250725 (245K) [application/x-gzip]
1.7.4.tar.gz: Permission denied
Cannot write to '1.7.4.tar.gz' (Success).修改hosts,
Ubuntu 下检查此时 github.com 网络是否可达：
c
wqbboy@wqbboy:/opt/mails$ sudo vi /etc/hosts
wqbboy@wqbboy:/opt/mails$ sudo vi /etc/hosts
wqbboy@wqbboy:/opt/mails$ cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 wqbboy.domain.com wqbboy
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
140.82.112.3 github.com
151.101.1.194 github.global.ssl.fastly.net
wqbboy@wqbboy:/opt/mails$ wget https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
--2025-09-06 10:48:50-- https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Resolving github.com (github.com)... 140.82.112.3
Connecting to github.com (github.com)|140.82.112.3|:443... connected.
HTTP request sent, awaiting response... No data received.
Retrying.
--2025-09-06 10:50:21-- (try: 2) https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Connecting to github.com (github.com)|140.82.112.3|:443... connected.
HTTP request sent, awaiting response... No data received.
Retrying.
--2025-09-06 10:52:09-- (try: 3) https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Connecting to github.com (github.com)|140.82.112.3|:443... failed: Connection timed out.
Resolving github.com (github.com)... 140.82.112.3
Connecting to github.com (github.com)|140.82.112.3|:443... ^[[A重新执行
c
wqbboy@wqbboy:/opt/mails$ wget https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
--2025-09-06 10:54:29-- https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Resolving github.com (github.com)... 140.82.112.3
Connecting to github.com (github.com)|140.82.112.3|:443... ^C
wqbboy@wqbboy:/opt/mails$ sudo git config --global -- unset http.proxy
error: key does not contain a section: unset
wqbboy@wqbboy:/opt/mails$ sudo git config --global -- unset https.proxy
error: key does not contain a section: unset
wqbboy@wqbboy:/opt/mails$ sudo git config --global --unset http.proxy
wqbboy@wqbboy:/opt/mails$ sudo git config --global --unset https.proxy
wqbboy@wqbboy:/opt/mails$ cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 wqbboy.domain.com wqbboy
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
140.82.112.3 github.com
151.101.1.194 github.global.ssl.fastly.net
wqbboy@wqbboy:/opt/mails$ ping github.com
PING github.com (140.82.112.3) 56(84) bytes of data.
64 bytes from github.com (140.82.112.3): icmp_seq=1 ttl=46 time=271 ms
64 bytes from github.com (140.82.112.3): icmp_seq=2 ttl=46 time=269 ms
64 bytes from github.com (140.82.112.3): icmp_seq=3 ttl=46 time=270 ms
64 bytes from github.com (140.82.112.3): icmp_seq=5 ttl=46 time=269 ms
^C
--- github.com ping statistics ---
6 packets transmitted, 4 received, 33.3333% packet loss, time 5036ms
rtt min/avg/max/mdev = 268.931/269.738/270.906/0.723 ms
wqbboy@wqbboy:/opt/mails$ wget https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
--2025-09-06 10:56:59-- https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Resolving github.com (github.com)... 140.82.112.3
Connecting to github.com (github.com)|140.82.112.3|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4 [following]
--2025-09-06 10:57:00-- https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4
Resolving codeload.github.com (codeload.github.com)... 20.205.243.165
Connecting to codeload.github.com (codeload.github.com)|20.205.243.165|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [application/x-gzip]
1.7.4.tar.gz: Permission denied
Cannot write to '1.7.4.tar.gz' (Success).
wqbboy@wqbboy:/opt/mails$ ls
wqbboy@wqbboy:/opt/mails$ wget https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
--2025-09-06 10:57:10-- https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Resolving github.com (github.com)... 140.82.112.3
Connecting to github.com (github.com)|140.82.112.3|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4 [following]
--2025-09-06 10:57:11-- https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4
Resolving codeload.github.com (codeload.github.com)... 20.205.243.165
Connecting to codeload.github.com (codeload.github.com)|20.205.243.165|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 250725 (245K) [application/x-gzip]
1.7.4.tar.gz: Permission denied
Cannot write to '1.7.4.tar.gz' (Success).
wqbboy@wqbboy:/opt/mails$ wget http://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
URL transformed to HTTPS due to an HSTS policy
--2025-09-06 10:57:26-- https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Resolving github.com (github.com)... 140.82.112.3
Connecting to github.com (github.com)|140.82.112.3|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4 [following]
--2025-09-06 10:57:28-- https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4
Resolving codeload.github.com (codeload.github.com)... 20.205.243.165
Connecting to codeload.github.com (codeload.github.com)|20.205.243.165|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 250725 (245K) [application/x-gzip]
1.7.4.tar.gz: Permission denied
Cannot write to '1.7.4.tar.gz' (Success).加上sudo
c
wqbboy@wqbboy:/opt/mails$ sodu wget http://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
sodu: command not found
wqbboy@wqbboy:/opt/mails$ sudo wget http://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
--2025-09-06 10:58:17-- http://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Resolving github.com (github.com)... 140.82.112.3
Connecting to github.com (github.com)|140.82.112.3|:80... connected.
HTTP request sent, awaiting response... 301 Moved Permanently
Location: https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz [following]
--2025-09-06 10:58:18-- https://github.com/iredmail/iRedMail/archive/refs/tags/1.7.4.tar.gz
Connecting to github.com (github.com)|140.82.112.3|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4 [following]
--2025-09-06 10:58:19-- https://codeload.github.com/iredmail/iRedMail/tar.gz/refs/tags/1.7.4
Resolving codeload.github.com (codeload.github.com)... 20.205.243.165
Connecting to codeload.github.com (codeload.github.com)|20.205.243.165|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [application/x-gzip]
Saving to: '1.7.4.tar.gz'
1.7.4.tar.gz [ <=> ] 244.85K 840KB/s in 0.3s
2025-09-06 10:58:20 (840 KB/s) - '1.7.4.tar.gz' saved [250725]
wqbboy@wqbboy:/opt/mails$ ls
1.7.4.tar.gz
wqbboy@wqbboy:/opt/mails$