配置yum源

配置阿里云yum源

1.备份

mkdir repobak

mv *.repo repoback/

2.下载Centos-Base.repo 到路径/etc.yum.repos.d/

wget -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-8.repo

3.清除缓存

yum clean all

4.重建缓存

yum makecache