ubuntu中查看防火墙状态、关闭、开启防火墙

1、查看状态

root@DESKTOP-1N42TVH:/home# ufw status      ## 开启状态
Status: active

2、关闭防火墙

root@DESKTOP-1N42TVH:/home# ufw disable
Firewall stopped and disabled on system startup

root@DESKTOP-1N42TVH:/home# ufw status
Status: inactive

3、启用防火墙

root@DESKTOP-1N42TVH:/home# ufw enable   ##（有报错？？）

root@DESKTOP-1N42TVH:/home# ufw status
Status: active