centos7 修改yum源为阿里源
cd /etc/yum.repos.d sudo mv CentOS-Base.repo CentOS-Base.repo.bak sudo wget -O CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo sudo wget -P /etc/yum.repos.d/ http://mirrors.aliyun.com/repo/epel-7.repo yum clean all yum makecache
其中第四行为了添加阿里EPEL源,可选