linux 端口操做相關指令

1. 查看端口是否已開

firewall-cmd --query-port=80/tcp

2.查看防火牆狀態

systemctl status firewalld

running 狀態即防火牆已經開啓

3.開啓防火牆

systemctl start firewalld

1. 開啓防火牆

service firewalld start

5.關閉防火牆

systemctl stop firewalld

-  上述方式可能沒法開啓，能夠先
    systemctl unmask firewalld.service 
    而後 
    systemctl start firewalld.service

1. 開永久端口號

firewall-cmd --add-port=80/tcp --permanent

- 提示 success 表示成功

1. 從新載入配置

firewall-cmd --reload

8.移除端口

firewall-cmd --permanent --remove-port=8001/tcp