Extra Packages for Enterprise Linux (EPEL)

一直不知道epel是什么意思，只知道安装它。上面是它的全称。

一台服务器上，默认的YUM源可能会少很多包，所以我们要手动增加新的YUM源。

1、查看初始状态的YUM源

2、添加新的EPEL源

https://fedoraproject.org/wiki/EPEL

对于RHEL/CentOS 6：

# yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm

对于RHEL/CentOS 7：

# yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

3、手动更新

# yum makecache

4、再次查看YUM源列表

5、关于其他YUM源的添加

参考地址：https://blog.itnmg.net/2012/09/17/centos-yum-source/

添加Remi源：

rpm -ivh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm

rpm -ivh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm

添加RPMfoge源：

http://repository.it4i.cz/mirrors/repoforge/redhat/el7/en/x86_64/rpmforge/RPMS/rpmforge-release-0.5.3-1.el7.rf.x86_64.rpm

http://repository.it4i.cz/mirrors/repoforge/redhat/el6/en/x86_64/rpmforge/RPMS/rpmforge-release-0.5.3-1.el6.rf.x86_64.rpm

添加 CentALT 源：

http://centos.alt.ru/

添加php源：

rpm -Uvh http://mirror.webtatic.com/yum/el6/latest.rpm

rpm -Uvh http://mirror.webtatic.com/yum/el7/latest.rpm