通过wget命令下载RPM文件，然后安装。

RHEL/CentOS 7 64 Bit

## RHEL/CentOS 7 64-Bit ### wget http://dl.fedoraproject.org/pub/epel/beta/7/x86_64/epel-release-7-0.2.noarch.rpm# rpm -ivh epel-release-7-0.2.noarch.rpm

RHEL/CentOS 6 32-64 Bit

## RHEL/CentOS 6 32-Bit ### wget http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm# rpm -ivh epel-release-6-8.noarch.rpm## RHEL/CentOS 6 64-Bit ### wget http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm# rpm -ivh epel-release-6-8.noarch.rpm

RHEL/CentOS 5 32-64 Bit

## RHEL/CentOS 5 32-Bit ### wget http://download.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm# rpm -ivh epel-release-5-4.noarch.rpm## RHEL/CentOS 5 64-Bit ### wget http://download.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm# rpm -ivh epel-release-5-4.noarch.rpm

RHEL/CentOS 4 32-64 Bit

## RHEL/CentOS 4 32-Bit ### wget http://download.fedoraproject.org/pub/epel/4/i386/epel-release-4-10.noarch.rpm# rpm -ivh epel-release-4-10.noarch.rpm## RHEL/CentOS 4 64-Bit ### wget http://download.fedoraproject.org/pub/epel/4/x86_64/epel-release-4-10.noarch.rpm# rpm -ivh epel-release-4-10.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 repolistLoaded plugins: fastestmirrorLoading mirror speeds from cached hostfile * base: mirrors.yun-idc.com * epel: ftp.sjtu.edu.cn * extras: mirrors.yun-idc.com * updates: mirrors.yun-idc.comrepo id                        repo name                                                     statusbase/7/x86_64                  CentOS-7 - Base                                               8,465epel/x86_64                    Extra Packages for Enterprise Linux 7 - x86_64                5,036extras/7/x86_64                CentOS-7 - Extras                                                30updates/7/x86_64               CentOS-7 - Updates                                              423repolist: 13,954[root@Lixiaolong ~]# 

如何使用epel源安装软件？

例如想查看cacti信息

# yum --enablerepo=epel info cacti

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.