1. 下载repo文件

    wget http://mirrors.163.com/.help/CentOS6-Base-163.repo

  2. 2

    备份并替换系统的repo文件

    [root@localhost ~]# cd /etc/yum.repos.d/

    [root@localhost ~]# mv CentOS-Base.repo CentOS-Base.repo.bak

    [root@localhost ~]# mv CentOS6-Base-163.repo CentOS-Base.repo

  3. 3

    执行yum源更新命令

    [root@localhost ~]# yum clean all

    root@localhost ~]# yum makecache

    [root@localhost ~]# yum update