Finding the process that is using a certain port in Linux

Question

I'd like to be able to find out which process is currently using a certain port in Linux. Is there any way to do this?

nagul · Answer 1 · 2009-09-17 19:03:51Z

up vote 20 down vote accepted

You have a couple of options:

lsof -i tcp:80

will give you the list of processes using tcp port 80.

Alternatively,

sudo netstat -nlp

will give you all open network connections.

answered Sep 17 '09 at 19:03

nagul
10.7k2043

lsof -i | grep {username} is also very useful, i.e. lsof -i | grep apache – ultrasawblade Oct 30 '11 at 3:20

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Nick · Answer 2 · 2009-09-17 18:54:37Z

up vote 4 down vote

netstat -lp

answered Sep 17 '09 at 18:54

Nick
28613

	on mac you have to add a protocol option to -p. so something like: netstat -lp tcp. – vrish88 May 25 '10 at 14:59
	On linux, -p lists the process owning the socket. – Jürgen Strobel Sep 28 '11 at 21:55

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2 Answers