#!/bin/bash
cd /etc/yum.repos.d/
mkdir /etc/yum.repos.d/repo
mv  *.repo repo/
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum makecache
yum update -y
yum -y install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
参考文档:  https://zhuanlan.zhihu.com/p/92503443