1:查看防火状态
systemctl status firewalld
service iptables status
2:暂时关闭防火墙
systemctl stop firewalld
service iptables stop
3:永久关闭防火墙
systemctl disable firewalld
chkconfig iptables off
4:重启防火墙
systemctl enable firewalld
service iptables restart
5:永久关闭后重启
//暂时还没有试过
chkconfig iptables on
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网卡重启方法：systemctl restart network
DNS配置文件：cat /etc/resolv.conf
设置主机和IP绑定信息：cat /etc/hosts
设置主机名：cat /etc/hostname