cmd / kill-pid-on-port

updated September 06, 2025

To kill a process listening on a given port:

kill-pid-on-port 3000

Script:

#!/bin/bash
#
# https://github.com/croaky/laptop/blob/main/bin/kill-pid-on-port

set -euo pipefail

lsof -n -i :"$1" | grep LISTEN | awk '{ print $2 }' | xargs kill

Why not lsof -ti :3000 | xargs kill?

lsof -ti returns all processes on the port—servers and clients. grep LISTEN ensures we only kill the server.

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