#启动一个服务
systemctl start firewalld.service#关闭一个服务(临时关闭防火墙)
systemctl stop firewalld.service#重启一个服务(重启防火墙)
systemctl restart firewalld.service#显示一个服务的状态
systemctl status firewalld.service#在开机时启用一个服务
systemctl enable firewalld.service#在开机时禁用一个服务(永久关闭防火墙)
systemctl disable firewalld.service#查看服务是否开机启动
systemctl is-enabled firewalld.service;echo $?#查看已启动的服务列表
systemctl list-unit-files|grep enabled# 查询linux系统防火墙开启状态
firewall-cmd --state1:查看防火状态systemctl status firewalldservice iptables status2:暂时关闭防火墙systemctl stop firewalldservice iptables stop3:永久关闭防火墙systemctl disable firewalldchkconfig iptables off4:重启防火墙systemctl enable firewalldservice iptables restart