阿里源centos yum epel

1.安装base reop源

cd /etc/yum.repos.d

接着备份旧的配置文件

sudo mv CentOS-Base.repo CentOS-Base.repo.bak

下载阿里源的文件

sudo wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

2 安装epel repo源：

epel(RHEL 7)

wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

epel(RHEL 6)

wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo

epel(RHEL 5)

wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-5.repo

3.清理缓存

yum clean all

4.重新生成缓存

yum makecache