1.安装yum优先级插件

yum install yum-priorities

2.epel简介: https://fedoraproject.org/wiki/EPEL/zh-cn

rpm -Uvh http://mirrors.ustc.edu.cn/fedora/epel/6/x86_64/epel-release-6-8.noarch.rpm
rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm

以上URL请按实际情况修改

3.查看是否安装成功

rpm -q epel-release

4.导入key:

rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

5.修改/etc/yum.repos.d/epel.repo文件

在[epel]最后添加一条属性 priority=11

vi /etc/yum.repos.d/epel.repo

意思是yum先去官方源查,官方没有再去epel的源找

6.重建缓存

yum makecache