Centos7更换yum源为阿里源

1、备份源

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

2、下载新的 CentOS-Base.repo 到 /etc/yum.repos.d/

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

3、非阿里云ECS用户会出现 Couldn"t resolve host "mirrors.cloud.aliyuncs.com" 信息，不影响使用，可以修改配置

sed -i -e "/mirrors.cloud.aliyuncs.com/d" -e "/mirrors.aliyuncs.com/d" /etc/yum.repos.d/CentOS-Base.repo

4、生成缓存

yum makecache

5、查看当前源

yum repolist

原文链接：https://www.cnblogs.com/heqjy/archive/2020/07/21/13330420.html