# cat /etc/redhat-release

 

源配置目录

cd /etc/yum.repos.d

vi CentOS-AppStream.repo

baseurl=https://mirrors.aliyun.com/centos/$releasever/AppStream/$basearch/os/

vi CentOS-Base.repo

baseurl=https://mirrors.aliyun.com/centos/$releasever/BaseOS/$basearch/os/

vi CentOS-Extras.repo

baseurl=https://mirrors.aliyun.com/centos/$releasever/extras/$basearch/os/

# dnf -y install epel-release

# dnf clean all

# dnf makecache

# dnf repolist