监控网络状态 netstat

基本语法

netstat [选项]

选项	说明
-an	按一定顺序排列输出
-p	显示哪个进程在调用

netstat -anp

[root@blog ~]# netstat -anp
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:12222           0.0.0.0:*               LISTEN      1236/sshd           
tcp        0      0 0.0.0.0:3306            0.0.0.0:*               LISTEN      1335/mysqld         
tcp        0      0 10.0.4.11:48778         169.254.0.55:5574       ESTABLISHED 1833/YDService      
tcp        0     52 10.0.4.11:12222         113.249.215.221:6034    ESTABLISHED 9975/sshd: root@pts

netstat -tlunp

[root@blog ~]# netstat -tlunp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:12222           0.0.0.0:*               LISTEN      1236/sshd           
tcp        0      0 0.0.0.0:3306            0.0.0.0:*               LISTEN      1335/mysqld         
tcp6       0      0 :::80                   :::*                    LISTEN      4111/httpd          
tcp6       0      0 :::12222                :::*                    LISTEN      1236/sshd           
udp        0      0 0.0.0.0:68              0.0.0.0:*                           981/dhclient