CentOS7 更换阿里yum源并更新系统

yum -y install wget
cd /etc/yum.repos.d/
wget http://mirrors.aliyun.com/repo/Centos-7.repo
mv CentOS-Base.repo CentOS-Base.repo.bak
mv Centos-7.repo CentOS-Base.repo
yum clean all
yum makecache
yum update -y

原文链接：https://blog.csdn.net/qq_16036197/article/details/109039577