yum install -y epel-release
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again
vi /etc/yum.repos.d/epel.repo
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
具体如下：
[epel]
name=Extra Packages for Enterprise Linux 6 – $basearch
baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch