1.備份本地yum源
[root@bogon ~]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo_bak
2.獲取阿里yum源配置文件
[root@bogon ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
3.更新yum緩存
[root@bogon ~]# yum makecache
4.查看當前yum源
[root@bogon ~]# yum repolist
