how to use netstat on a specific port in Linux

Guys i want to know if my specific port is running a server using netstat? how do i achieve that?

3 Answers

You can use

netstat -pnlt | grep ':portno' 

another option , you can use nmap tool for checking open ports on the server

nmap -sT -O localhost 

Output

Starting nmap 3.55 ( ) at 2004-09-24 13:49 EDT Interesting ports on localhost.localdomain (127.0.0.1): (The 1653 ports scanned but not shown below are in state: closed) PORT STATE SERVICE 22/tcp open ssh 25/tcp open smtp 111/tcp open rpcbind Device type: general purpose 

Netstat Example :

[root@krizna ~]# netstat -pnlt | grep ':80' Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 :::80 :::* LISTEN 1164/httpd 

use netstat -anp | grep portNumber

I think netstat -nat | grep port | grep LISTEN should do the trick.