Centos7.x RHEL 配置EPEL第三方YUM源

转自：http://linux.it.net.cn/CentOS/course/2014/1214/10265.html（已经改正原文中地址失效的问题）

（经测试，此源可以安装yumex）

Epel介绍

具体请参见：http://fedoraproject.org/wiki/EPEL

如何安装 Epel源到 RHEL/CentOS 7/6/5?

通过wget命令下载RPM文件，然后安装。

RHEL/CentOS 7

# wget http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
# rpm -ivh epel-release-7.noarch.rpm IT网，http://www.it.net.cn 

RHEL/CentOS 6 

## RHEL/CentOS 6 
# wget 

http://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm

# rpm -ivh epel-release-6.noarch.rpm

如何检查epel是否安装成功？

使用一下命令：

# yum repolist  

输出如下

[root@Lixiaolong ~]# yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.yun-idc.com
 * epel: ftp.sjtu.edu.cn
 * extras: mirrors.yun-idc.com
 * updates: mirrors.yun-idc.com
repo id                        repo name                                                     status
base/7/x86_64                  CentOS-7 - Base                                               8,465
epel/x86_64                    Extra Packages for Enterprise Linux 7 - x86_64                5,036
extras/7/x86_64                CentOS-7 - Extras                                                30
updates/7/x86_64               CentOS-7 - Updates                                              423
repolist: 13,954
[root@Lixiaolong ~]# 
 IT网，http://www.it.net.cn 

如何使用epel源安装软件？

例如想查看cacti信息

# yum --enablerepo=epel info cacti  

IT网，http://www.it.net.cn

安装则执行以下命令：

# yum --enablerepo=epel install cacti  

Note: Epel的配置文件在/etc/yum.repos.d/epel.repo.