On Tue, 30 May 2000, Rodent of Unusual Size wrote:
> Argh.. I used to know this (I think), but now I've forgotten..
>
> How can I turn a port number from netstat's output into a PID?
> I want to find out what non-obvious thing is listening on a
> particular port..
With more recent versions of the netstat command, you can use the -p
option to find out the process id associated with the socket. I would
give an example but the output is messy if you don't have a display
that's about 132 chars wide...
If you have an older version of netstat which does not do this, you should
be able to poke through the output of lsof to figure it out.
For example, if you wanted to find out which processes were bound to port
80 on your machine:
[root@martin martin]# lsof |grep www
httpd 590 root 16u IPv4 827 TCP *:www (LISTEN)
httpd 29691 root 16u IPv4 827 TCP *:www (LISTEN)
httpd 29692 root 16u IPv4 827 TCP *:www (LISTEN)
httpd 29693 root 16u IPv4 827 TCP *:www (LISTEN)
[snippage]
--
Derek Martin
System Administrator
Mission Critical Linux
[EMAIL PROTECTED]
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