centos安裝epel源

yum -y install wget
cd /etc/yum.repos.d/
mkdir bak
mv ./*.repo bak
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo
yum clean all && yum makecache