Linux---配置国内yum源

网络yum源一般是指163、搜狐、阿里、中国科技大学等公共的网络yum源，或者是自建的局域网yum仓库。配置网络yum源有2种方式：

• 一种是直接下载官方的yum配置文件替换到本地
• 另一种是修改本地的yum配置文件中的baseurl地址

1. 下载前要确定自己系统版本：

cat /etc/system-release

2. 这里我们将原yum配置文件移动到自定义的目录下进行一个简单的备份，如果出现意外后也可以及时回滚

mv /etc/yum.repos.d/CentOS-base.repo /home/chihai/backup/yum/

3. 下载镜像文件

wget http://mirrors.aliyun.com/repo/Centos-8.repo

4.清除yum缓存、刷新yum缓存

yum clean all
yum makecache

vim /etc/yum.repos.d/CentOS8.repo
切记依然需要清除喝刷新缓存

```bash
1 [baseOS]
 2 name=baseOS
 3 baseurl=https://mirrors.aliyun.com/centos/8/baseOS/x86_64/os/
 4         https://mirrors.huaweicloud.com/centos/8/baseOS/x86_64/os/
 5         https://mirrors.163.com/centos/8/baseOS/x86_64/os/
 6 gpgcheck=1
 7 gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official
 8 
 9 [AppStream]
10 name=AppStream
11 baseurl=https://mirrors.aliyun.com/centos/8/AppStream/x86_64/os/
12         https://mirrors.huaweicloud.com/centos/8/AppStream/x86_64/os/
13         https://mirrors.163.com/centos/8/AppStream/x86_64/os/
14 gpgcheck=1
15 gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official
16 
17 
18 [epel]
19 name=epel
20 baseurl=https://mirrors.aliyun.com/epel/8/Everything/x86_64/
21 gpgcheck=1
22 gpgkey=https://mirrors.aliyun.com/epel/RPM-GPG-KEY-EPEL-8
23 
24 [extras]
25 name=extras
26 baseurl=https://mirrors.aliyun.com/centos/8/extras/x86_64/os/
27 gpgcheck=1
28 gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official