CentOS更改yum源与更新系统

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

1. 进入yum源配置文件所在文件夹

cd /etc/yum.repos.d/

1. 下载163的yum源配置文件，放入/etc/yum.repos.d/

[root@localhost yum.repos.d]# wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
[root@localhost yum.repos.d]# mv  CentOS6-Base-163.repo  CentOS-Base.repo

如果提示wget没安装则先安装wget

yum -y install wget

1. 运行yum makecache生成缓存

yum makecache

1. 更新系统

yum -y update