How to find what's listening on what port

[Matthew Hawkins]

On Thu, 11 Oct 2001, Mark Hummel wrote:
> Hi, 
> 
> The output of netstat -A yields the following line:
> 
> tcp        0      0 *:6000                  *:*                     LISTEN 
> 
> How do I discover what is listening on that port? It does not appear in
> /etc/services. 

Strange, my /etc/services includes:

x11             6000/tcp   #6000-6063 are assigned to X Window System
x11             6000/udp

in any case, 'lsof' is a neat tool to tell you what's going on.
In this case, you'd probably call 'lsof -i tcp:6000'

Cheers,

-- 
Matt