centos修改yum源为阿里
备份原来 yum 文件
[root@node01 ~]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo_bak下载阿里云的 CentOS-Base.repo 到/etc/yum.repos.d/
[root@node01 ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo清空 yum 缓存
[root@node01 ~]# yum clean all生成新的阿里云的yum缓存,加速下载预热数据
[root@node01 ~]# yum makecache