What is the linux command to find out the number of socket currently open?

Question

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

This is more of a sys admin question. Voting to close. Expecting it will be migrated to ServerFault — Paul Sasik, May 18 '12 at 01:02

score 3 · Answer 1 · answered May 18 '12 at 01:09

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.

score 2 · Answer 2 · edited Jul 20 '12 at 20:14

2

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 "

edited Jul 20 '12 at 20:14

bahamat

answered May 18 '12 at 01:07

Paul

score 1 · Answer 3 · edited Jul 20 '12 at 18:42

1

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

edited Jul 20 '12 at 18:42

Lucas Kauffman

answered May 18 '12 at 01:25

pritam

3 Answers3