Who has port X open?

[mcaron at tiac.net (Mark Caron)]

Try netstat -pn -tu  When I did this I got the following:

mcaron:~ # netstat -pn -tu
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
PID/Program name
tcp        1      0 38.32.9.67:3921         209.50.235.253:80       CLOSE_WAIT 
509/netscape
tcp        1      0 38.32.9.67:3907         64.28.67.57:80          CLOSE_WAIT 
509/netscape
tcp        1      0 38.32.9.67:3906         64.28.67.57:80          CLOSE_WAIT 
509/netscape

Mark 

John Chambers wrote:
> 
> Not to change the subject or anything, but in the midst  of
> the deep philosophical debate, does anyone happen to know:
> 
> How can I tell what program has port X opoen?
> 
> There are some ports open that I can't identify.  I do know
> that  netscape likes to keep ports open long after I've hit
> the back button.  But it'd be useful to be able to see  who
> is talking to whom. Some of those connections might be good
> to shut down.
> 
> I've learned the answer to this question  on  a  number  of
> other  unices,  and  so  far  every  one  of  them has been
> different.  I don't seem to see the answer anywhere in  the
> linux docs, and I'd expect that there's a way to do it.
> 
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