请注意EPEL 的安装包是独立编译的，所以它可以安装在32位和64位系统中。
1. 下载rmp包：wget http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
2. 安装rpm包：rpm -ivh epel-release-6-8.noarch.rpm
3. 检查epel源：yum repolist 如出现如下类似提示则表示成功了；
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.vonline.vn
* epel: buaya.klas.or.id
* extras: centos-hn.viettelidc.com.vn
* updates: mirrors.fibo.vn
repo id repo name status
base CentOS-6 - Base 6,381
epel Extra Packages for Enterprise Linux 6 - x86_64 10,023
extras CentOS-6 - Extras 13
updates CentOS-6 - Updates 1,555
repolist: 18,019
4. 安装epel的时候，执行yum repolist 可能会报错：Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again
解决办法：处理很简单，修改文件“/etc/yum.repos.d/epel.repo”， 将baseurl的注释取消， mirrorlist注释掉。即可。