Centos7更換阿里yum源

1. 備份原鏡像文件，便於后期恢復

$sudo mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

 

2.下載新的CentOS-Base.repo 到/etc/yum.repos.d/

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

 

3. 清除緩存

yum clean all

 

4. 生成緩存

yum makecache