查看“Yum配置源”的源代码

参考：https://developer.aliyun.com/mirror/centos

=== 备份 ===
<syntaxhighlight lang="shell-session">
[root@iZ8vbcjkeqbrdmmbt23vboZ yum.repos.d]# ls -lh
total 12K
-rw-r--r-- 1 root root  675 Nov 28  2021 CentOS-Base.repo
-rw-r--r-- 1 root root 1.9K Nov 22  2021 docker-ce.repo
-rw-r--r-- 1 root root  230 Nov 28  2021 epel.repo
[root@iZ8vbcjkeqbrdmmbt23vboZ yum.repos.d]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
[root@iZ8vbcjkeqbrdmmbt23vboZ yum.repos.d]# ls -lh
total 12K
-rw-r--r-- 1 root root  675 Nov 28  2021 CentOS-Base.repo.backup
-rw-r--r-- 1 root root 1.9K Nov 22  2021 docker-ce.repo
-rw-r--r-- 1 root root  230 Nov 28  2021 epel.repo
[root@iZ8vbcjkeqbrdmmbt23vboZ yum.repos.d]# 
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=== 下载新的 CentOS-Base.repo 到 /etc/yum.repos.d/ ===
CentOS 7<syntaxhighlight lang="shell-session">
[root@iZ8vbcjkeqbrdmmbt23vboZ yum.repos.d]# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
--2022-08-17 06:02:18--  https://mirrors.aliyun.com/repo/Centos-7.repo
Resolving mirrors.aliyun.com (mirrors.aliyun.com)... 220.181.158.239, 220.181.158.242, 220.181.158.243, ...
Connecting to mirrors.aliyun.com (mirrors.aliyun.com)|220.181.158.239|: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 0.02s   

2022-08-17 06:02:18 (110 KB/s) - ‘/etc/yum.repos.d/CentOS-Base.repo’ saved [2523/2523]

[root@iZ8vbcjkeqbrdmmbt23vboZ yum.repos.d]# ls -lh
total 16K
-rw-r--r-- 1 root root 2.5K Aug  4 15:04 CentOS-Base.repo
-rw-r--r-- 1 root root  675 Nov 28  2021 CentOS-Base.repo.backup
-rw-r--r-- 1 root root 1.9K Nov 22  2021 docker-ce.repo
-rw-r--r-- 1 root root  230 Nov 28  2021 epel.repo
[root@iZ8vbcjkeqbrdmmbt23vboZ yum.repos.d]# 

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=== 运行 yum makecache 生成缓存 ===
<syntaxhighlight lang="shell-session">
[root@iZ8vbcjkeqbrdmmbt23vboZ yum.repos.d]# yum makecache
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.cloud.aliyuncs.com
 * extras: mirrors.cloud.aliyuncs.com
 * updates: mirrors.cloud.aliyuncs.com
base                                                                                                                                                                                                                 | 3.6 kB  00:00:00     
docker-ce-stable                                                                                                                                                                                                     | 3.5 kB  00:00:00     
epel                                                                                                                                                                                                                 | 4.7 kB  00:00:00     
extras                                                                                                                                                                                                               | 2.9 kB  00:00:00     
updates                                                                                                                                                                                                              | 2.9 kB  00:00:00     
(1/10): epel/x86_64/prestodelta                                                                                                                                                                                      |  553 B  00:00:00     
(2/10): base/7/x86_64/other_db                                                                                                                                                                                       | 2.6 MB  00:00:00     
(3/10): extras/7/x86_64/filelists_db                                                                                                                                                                                 | 277 kB  00:00:00     
(4/10): epel/x86_64/other_db                                                                                                                                                                                         | 3.4 MB  00:00:00     
(5/10): extras/7/x86_64/other_db                                                                                                                                                                                     | 148 kB  00:00:00     
(6/10): updates/7/x86_64/other_db                                                                                                                                                                                    | 1.1 MB  00:00:00     
(7/10): updates/7/x86_64/filelists_db                                                                                                                                                                                | 9.4 MB  00:00:00     
(8/10): docker-ce-stable/7/x86_64/filelists_db                                                                                                                                                                       |  33 kB  00:00:01     
(9/10): docker-ce-stable/7/x86_64/other_db                                                                                                                                                                           | 125 kB  00:00:01     
(10/10): epel/x86_64/filelists_db                                                                                                                                                                                    |  12 MB  00:00:01     
Metadata Cache Created
[root@iZ8vbcjkeqbrdmmbt23vboZ yum.repos.d]# 

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