查询服务端口

[root@ftp:/root]
> lsof -i :22
COMMAND   PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
sshd     1002 root    3u  IPv4   29785      0t0  TCP *:ssh (LISTEN)
sshd     1002 root    4u  IPv6   29787      0t0  TCP *:ssh (LISTEN)
sshd    53109 root    3u  IPv4 3697959      0t0  TCP ftp:ssh->192.168.31.126:5831 (ESTABLISHED)

[root@ftp:/root]
>