1:下载repo文件
wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
2:备份并替换系统的repo文件
[ ~]# cd /etc/yum.repos.d/
[ ~]# mv CentOS-Base.repo CentOS-Base.repo.bak
[ ~]# mv CentOS6-Base-163.repo CentOS-Base.repo
3:执行yum源更新命令
[ ~]# yum clean all
~]# yum makecache
[ ~]# yum update
来源: