I use that :

sudo watch lsof -i -4 -a -P

and it returns a list.

how to get the count?

I tried this but doesn't work.

sudo watch lsof -i -4 -a -P | wc -l

migrated from stackoverflow.com May 18 '12 at 22:55

This question came from our site for professional and enthusiast programmers.

  • This is more of a sys admin question. Voting to close. Expecting it will be migrated to ServerFault – Paul Sasik May 18 '12 at 1:02

I agree, this should probably be on ServerFault.

But, until then:

The issue with what you are doing is the watch command. Watch repeats a command so that you can see the output again and again over time.

My lsof doesn't accept a -4 argument, but if yours does, then

sudo lsof -i -4 -a -P | wc -l

Works for me.


try netstat -a | wc -l for all type of open sockets and netstat -l | wc -l for displaying server sockets.


To get the count, you need escape quotes to contain the entire command for the shells spawned by watch:

(Also, -4 didn't work here)

sudo watch "lsof -i -a -P | wc -l "

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.