centos7换阿里源
1.备份本地yum源[root@bogon ~]# mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo_bak2.获取阿里yum源配置文件[root@bogon ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo3.更新yum缓存[root@bogon ~]# y