CentOS8更换yum安装源

1. 备份系统repo文件

cd /etc/yum.repos.d/
mkdir repo_bak #新建文件夹用来保存系统自带repo文件
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/repo.bak #备份文件移入新建的文件夹

2. 配置yum源

vim /etc/yum.repos.d/CentOS8.repo

[baseOS]
name=baseOS
baseurl=https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/
        https://mirrors.huaweicloud.com/centos/8/BaseOS/x86_64/os/
        https://mirrors.163.com/centos/8/BaseOS/x86_64/os/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official

[AppStream]
name=AppStream
baseurl=https://mirrors.aliyun.com/centos/8/AppStream/x86_64/os/
        https://mirrors.huaweicloud.com/centos/8/AppStream/x86_64/os/
        https://mirrors.163.com/centos/8/AppStream/x86_64/os/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official

[epel]
name=epel
baseurl=https://mirrors.aliyun.com/epel/8/Everything/x86_64/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/epel/RPM-GPG-KEY-EPEL-8

[extras]
name=extras
baseurl=https://mirrors.aliyun.com/centos/8/extras/x86_64/os/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official

3. 重启系统,换源成功

4. 安装时报错处理

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo
sed -i 's/$releasever/8/g' /etc/yum.repos.d/CentOS-Base.repo
yum clean all *#清理缓存*
yum makecache *#更新源*