Looking for lsof examples

[Jack C. Mahaffey]

Got any lsof examples to share? I just installed it and would like to build a quick cheat sheet on using the tool for files, processes, and ports.

I have the binary but no man pages.

Jack...

[Massimo Bianchi]

Get binay and man pages at:

http://hpux.connect.org.uk/hppd/hpux/Sysadmin/lsof-4.67/

:)

Massimo

[Tom Danzig · Accepted solution]

A few useful ones -

Check for process usage on port 25:
# lsof -i :25

Check for any process using the /home mount:
# lsof /home

Check what TCP connection a process is using:
# lsof -p -a -i tcp

Get the man page. It's quite descriptive (and lengthy!).

[Jeff Schussele]

Jack,

Attached is a text file of the man page for lsof v4.55.

HTH,
Jeff

[Kent Ostby]

Here's a sample set of commands to find out how many files each process is keeping open:

#ps -ef | awk '{print $2}' > /tmp/list
#cat /tmp/list | while read pid
>do
>echo $pid >> /tmp/lsof.out
>lsof -p $pid >> /tmp/lsof.out
>done
# cat /tmp/lsof.out | more