How to kill a process by port on MacOS, a la fuser -k 9000/tcp

Question

On linux I can kill a process knowing only the port it is listening on using fuser -k 9000/tcp, how do I so the same on MacOS?

score 34 · Accepted Answer · edited Jul 18 '17 at 05:35

34

lsof -P | grep ':PortNumber' | awk '{print $2}' | xargs kill -9

Change PortNumber to the actual port you want to search for.

edited Jul 18 '17 at 05:35

Community

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answered Jul 20 '12 at 22:24

stefano

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I just had to add `-9` to the end to get this to work, but I believe that is due to the nature of the listening application and not generally recommended practice, to `kill -9` that is. – Kris Jul 24 '12 at 07:37
@Kris - lsof -P | grep ':NumberOfPort' | awk '{print $2}' | xargs kill -9 worked! – aces. Jan 18 '13 at 15:56

score 23 · Answer 2 · edited Apr 30 '21 at 07:40

23

Adding the -t and -i flags to lsof should speed it up even more by removing the need for grep and awk.

lsof -nti:NumberOfPort | xargs kill -9

lsof arguments:

-n Avoids host names lookup (may result in faster performance)
-t Terse output; returns process IDs only to facilitate piping the output to kill
-i Selects only those files whose Internet address matches

kill arguments:

-9 Non-catchable, non-ignorable kill

edited Apr 30 '21 at 07:40

Derek Lee

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answered Aug 05 '16 at 21:11

Zlemini

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Works and is more concise than the accepted answer! – Big Rich Jul 11 '17 at 15:09
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WAY faster with this approach – daleyjem Jan 27 '20 at 16:14

score 4 · Answer 3 · answered Aug 10 '19 at 05:44

You can see if a port if open by this command

 sudo lsof -i :8000

where 8000 is the port number

If the port is open, it should return a string containing the Process ID (PID).

Copy this PID and

kill -9 PID

If you need to see all the open ports, you can perform a Port Scan in the Network Utility application.

score 3 · Answer 4 · answered Aug 07 '15 at 17:54

3

Add -n to lsof and you remove the reverse DNS lookup from the command and reduce the run time from minutes to seconds.

lsof -Pn | grep ':NumberOfPort' | awk '{print $2}' | xargs kill -9

answered Aug 07 '15 at 17:54

stevehollx

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score 2 · Answer 5 · answered May 18 '18 at 08:00

Check your port is open or not by

sudo lsof -i : {PORT_NUMBER}

COMMAND PID     USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
java    582 Thirumal  300u  IPv6 0xf91b63da8f10f8b7      0t0  TCP *:distinct (LISTEN)

2. Close the port by killing process PID

sudo kill -9 582

score 0 · Answer 6 · edited Jun 27 '17 at 13:10

0

You can use kill -9 $(lsof -i:PORT -t) 2> /dev/null, where PORT is your actual port number. It will kill the process which is running on your given port.

edited Jun 27 '17 at 13:10

Nathan.Eilisha Shiraini

2,633
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answered Jun 27 '17 at 11:53

Epk

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You are repeating other answer – yass Jun 27 '17 at 12:14

score 0 · Answer 7 · answered Mar 24 '20 at 21:43

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If you prefer to have tool with a GUI, you can use: https://github.com/ayedo/tcpkiller

answered Mar 24 '20 at 21:43

Ynv

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How to kill a process by port on MacOS, a la fuser -k 9000/tcp

7 Answers7