Centos7 更换源

查看源

yum repolist
yum repolist all

更换源

1. 备份

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

2. 下载源

把新的源CentOS-Base.repo下载到到/etc/yum.repos.d/

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

3. 生成缓存

yum makecache