查看防火墙状态：service firewalld?status
<p style="margin:0in;"pgxmg启防火墙：servicefirewalld start
关闭防火墙：service firewalld stop
重启防火墙：
<p style="margin:0in;"pgxmg启80端口：
firewall-cmd –zone=public –add-port=80/tcp–permanent
查看端口状态：netstat -tunlp
centos查看端口占用情况：netstat? -anltup | grep 80
82806921
