linux Centos 更换 阿里云 yum源

1. 备份原有 yum 源

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

2. 下载新的 yum 源

• Centos 6

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo

• Centos 7

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

3. 建立缓存

• 清除缓存

yum clean all

• 新建缓存

yum makecache