下载并安装了最新的Centos7.0系统，系统默认带的YUM源有时候不能满足需求，故使用fodora epelyum源是个不错的选择，eple所对应的RHEL7和Centos7已经出来了，替换方法如下：

Epel介绍

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 64 Bit

##RHEL/CentOS764-Bit##
#wgethttp://dl.fedoraproject.org/pub/epel/beta/7/x86_64/epel-release-7-0.2.noarch.rpm
#rpm-ivhepel-release-7-0.2.noarch.rpm

RHEL/CentOS 6 32-64 Bit

##RHEL/CentOS632-Bit##
#wgethttp://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
#rpm-ivhepel-release-6-8.noarch.rpm

##RHEL/CentOS664-Bit##
#wgethttp://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
#rpm-ivhepel-release-6-8.noarch.rpm

RHEL/CentOS 5 32-64 Bit

##RHEL/CentOS532-Bit##
#wgethttp://download.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm
#rpm-ivhepel-release-5-4.noarch.rpm

##RHEL/CentOS564-Bit##
#wgethttp://download.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm
#rpm-ivhepel-release-5-4.noarch.rpm

RHEL/CentOS 4 32-64 Bit

##RHEL/CentOS432-Bit##
#wgethttp://download.fedoraproject.org/pub/epel/4/i386/epel-release-4-10.noarch.rpm
#rpm-ivhepel-release-4-10.noarch.rpm

##RHEL/CentOS464-Bit##
#wgethttp://download.fedoraproject.org/pub/epel/4/x86_64/epel-release-4-10.noarch.rpm
#rpm-ivhepel-release-4-10.noarch.rpm

如何检查epel是否安装成功？

使用一下命令：

#yumrepolist

输出如下

[root@Lixiaolong~]#yumrepolist
Loadedplugins:fastestmirror
Loadingmirrorspeedsfromcachedhostfile
*base:mirrors.yun-idc.com
*epel:ftp.sjtu.edu.cn
*extras:mirrors.yun-idc.com
*updates:mirrors.yun-idc.com
repoidreponamestatus
base/7/x86_64CentOS-7-Base8,465
epel/x86_64ExtraPackagesforEnterpriseLinux7-x86_645,036
extras/7/x86_64CentOS-7-Extras30
updates/7/x86_64CentOS-7-Updates423
repolist:13,954
[root@Lixiaolong~]#

如何使用epel源安装软件？

例如想查看cacti信息

#yum--enablerepo=epelinfocacti

Sample Output

安装则执行以下命令：

#yum--enablerepo=epelinstallcacti

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

转自：http://linux.it.net.cn/CentOS/course/2014/1214/10265.html