1、备份原yum源html
[root@yancy ~]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.$(date +%F).bak
2、下载对应版本yum源centos
网易163yum源缓存
Centos连接:http://mirrors.163.com/.help/centos.htmlhtm
全系统连接:http://mirrors.163.com/.helpblog
[root@yancy ~]# cd /etc/yum.repos.d/ [root@yancy yum.repos.d]# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
3、运行如下命令生成缓存get
[root@yancy yum.repos.d]# yum clean all [root@yancy yum.repos.d]# yum makecache
4、更新class
[root@yancy yum.repos.d]# yum -y update