1. 備份
mkdir /etc/yum.repos.d/repo.bak
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/repo.bak
2. 配置yum源文件
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