Comments on: Linux List The Open Ports And The Process That Owns Them

By: Mark Nett

Mark Nett — Thu, 05 Jan 2012 11:51:19 +0000

Running sudo lsof -i gives me command not found?

By: paul

paul — Thu, 31 Mar 2011 17:45:00 +0000

@jeff

Thanks for the reply! Yes, I did run all the commands as root. I ran nc from both a different machine on the network and also the same machine that has the port open.

Any ideas?

By: Jeff Schroeder

Jeff Schroeder — Thu, 31 Mar 2011 06:35:17 +0000

@paul: did you run the commands as root?

By: paul

paul — Thu, 31 Mar 2011 03:08:22 +0000

What should I do when netstat lists the PID as “-” and lsof doesn’t list anything for that port? I know something is listening on that port because “nc -z -v -w1 1-65534″ says so.

By: alojamento de sites

alojamento de sites — Thu, 22 Jul 2010 12:29:57 +0000

Very useful, thanks

By: harsha gowda

harsha gowda — Thu, 10 Jul 2008 11:36:36 +0000

Thanks

By: Mark Nixon

Mark Nixon — Fri, 30 May 2008 18:42:48 +0000

Thanks Vikrant for the useful tip…I’ve used lsof for ages but sort of taken it for granted,didn’t check the man pages, and wasn’t aware of this option.

Great (!!!) site, by the way, I’ll start contributing my own tips as well. Thanks for giving me lots of ideas-projects to increase my understanding of Linux/BSD.

By: Jeff Schroeder

Jeff Schroeder — Fri, 30 May 2008 12:50:49 +0000

Shameless plug to a really good article I wrote about lsof and some of the more nifty tricks: Troubleshooting running systems with lsof