Obtaining a pid or process owner from netstat?

Glenn Gillis glenn at elaw.org
Thu Feb 1 01:12:06 UTC 2007

If 'netstat -anp tcp' shows me an IP address and port with a process
listening on it, can anyone suggest a way to determine either the pid or
the owner of the process that is bound to that address?

In other words:

% netstat -anp tcp | grep LISTEN
tcp4       0      0    *.*                   LISTEN
tcp4       0      0    *.*                   LISTEN
tcp4       0      0  *.8021                 *.*                   LISTEN
tcp4       0      0  *.8080                 *.*                   LISTEN
tcp4       0      0    *.*                   LISTEN
tcp4       0      0   *.*                   LISTEN

I'm interested in what is listening on, mainly
because I need something else to listen there. I know it's a Zope
instance, but I can't tell *which* Zope instance (there are many on this

NB: This is on a 4.11-RELEASE-p26 box.

Glenn Gillis
ELAW U.S. Information Technology Manager
Environmental Law Alliance Worldwide
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