CentOS 更换yum源

转自： linux 更新yum源 改成阿里云源

1. 备份

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

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

• CentOS 7

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

3. 运行yum makecache生成缓存