CentOS更新yum源

1、首先备份/etc/yum.repos.d/CentOS-Base.repo

mv /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

[root@localhost yum.repos.d]# 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)

[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

[root@localhost yum.repos.d]# yum -y update

6、安装vim编辑器

[root@localhost ~]# yum -y install vim*

转自：http://www.cnblogs.com/lightnear/archive/2012/10/03/2710952.html