启用EPEL6 yum源：
1、RHEL/CentOS/SL Linux 6.x 下安装 EPEL6 yum源：
32位系统选择：rpm -ivh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
64位系统选择：rpm -ivh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
导入key：rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6
2、RHEL/CentOS/SL Linux 7.x 下安装 EPEL7 yum源：
http://download.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm
本文出自 “小郑技术博客” 博客，请务必保留此出处http://ko178.blog.51cto.com/220419/1632304
RHEL/CentOS 下安装yum源地址汇集---不定期更新
原文：http://ko178.blog.51cto.com/220419/1632304