centos76网络/端口/防火墙常用命令

1. 查看防火墙所有开放的端口

firewall-cmd --zone=public --list-ports

2. 开放/关闭端口

firewall-cmd --zone=public --add-port=8888/tcp --permanent
firewall-cmd --reload

firewall-cmd --zone=public --remove-port=8888/tcp --permanent
firewall-cmd --reload

3. 开启/关闭/重启/查看防火墙

systemctl start firewalld.service

systemctl stop firewalld.service

systemctl restart firewalld.service

systemctl status firewalld.service

4. 开机自启/禁用防火墙

systemctl enable firewalld

systemctl disable firewalld

5. 查看防火墙开关状态

firewall-cmd --state

6. 检查端口(例如8888)被哪个进程占用

netstat -lnpt |grep 8888

7. 查看某进程(例如1234)的详细信息

ps 1234

8. 杀死/中止某进程(例如5678)

kill -9 5678

9. centos6和centos7网卡/网络重启

service network restart

systemctl restart network