centos更換阿里yum源和epel

centos6.XX更換阿里雲的源

1，安裝wget：yum install -y wget

2，備份原來的yum源: mv  /etc/yum.repos.d /etc/yum.repos.d_bk

1、刪除現有的源：rm -rf /etc/yum.repos.d/*  
2、下載阿里yum源文件：wget -P /etc/yum.repos.d/ http://mirrors.aliyun.com/repo/epel-6.repo http://mirrors.aliyun.com/repo/Centos-6.repo

3，清理緩存：yum clean all

這個時候，執行 yum repolist的結果如下
[root@di02 ~]# yum repolist
已加載插件：fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.aliyun.com
* epel: mirrors.aliyun.com
* extras: mirrors.aliyun.com
* updates: mirrors.aliyun.com
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