1.首先备份,这个习惯必须要有。
[yangcheng@localhost ~]$ cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
2.进入yum源配置文件所在文件夹
[yangcheng@localhost ~]$ cd /etc/yum.repos.d/
3.下载163的yum源配置文件,放入/etc/yum.repos.d/ (操作前请做好相应备份,步骤1)
[root@localhost yum.repos.d]# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
4.运行yum makecache生成缓存
[root@localhost yum.repos.d]# yum makecache
5.更新系统(耗时较长,主要因网速而异)
[root@localhost yum.repos.d]# yum -y update
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