cenos7切换阿里源

1. 备份并安装base reop源

cd /etc/yum.repos.d
sudo mv CentOS-Base.repo CentOS-Base.repo.bak

1. 下载阿里源并配置

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

1. 安装epel repo源

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

4 清理缓存

yum clean all

5 .重新生成缓存

yum makecache