命令	作用	案例
sudo firewall-cmd —add-port=端口/tcp —permanent	开放端口	sudo firewall-cmd —add-port=80/tcp —permanent
firewall-cmd —reload	重启防火墙	firewall-cmd —reload
firewall-cmd —list-all	查看防火墙 List	firewall-cmd —list-all
firewall-cmd —add-service=http -permanent		firewall-cmd —add-service=http -permanent
systemctl status firewalld	查看防火墙状态	systemctl status firewalld
systemctl stop firewalld	关闭防火墙	systemctl stop firewalld
systemctl start firewalld	启动防火墙	systemctl start firewalld
systemctl enable firewalld	设置下次开机防火墙也不会开启	systemctl enable firewalld