CentOS 配置yum源

1.下载yum源

Centos-7.repo

epel-7.repo

2. 替换

mv Centos-7.repo /etc/yum.repos.d/CentOS-Base.repo
mv epel-7.repo /etc/yum.repos.d/epel.repo

3.清理缓存，生成缓存，列出yum源

yum clean all
yum makecache
yum repolist