Centos7使用国内YUM源
备份
mkdir /etc/yum.repos.d/bak && mv /etc/yum.repos.d/*.repo /etc/yum/repos.d/bak阿里
curl http://mirrors.aliyun.com/repo/Centos-7.repo > /etc/yum.repos.d/aliyun.repomkdir /etc/yum.repos.d/bak && mv /etc/yum.repos.d/*.repo /etc/yum/repos.d/bakcurl http://mirrors.aliyun.com/repo/Centos-7.repo > /etc/yum.repos.d/aliyun.repo
