Centos7 yum源配置及关闭防火墙

清理源 #yum clean all
更新源缓存 #yum makecache
更新源 #yum update
设置主机名: #hostnamectl set-hostname

查看防火墙状态 #systemctl status firewalld.service
关闭命令： #systemctl stop firewalld.service
禁用开机自启 #systemctl disable firewalld.service
关闭selinux #vim /etc/sysconfig/selinux                 改为disabled