Find And Kill Process Running On Specific Port On macOS
March 6, 2024 by Andreas Wik
Every now and then when I’m about to start something up, maybe a local dev server, I get this annoying error telling me that the port is already being used by another process.
Example:
Error: listen EADDRINUSE: address already in use :::3001
So let’s see how you can find and kill the process occupying a specific port.
Find the process
Find the process by running the following command in the terminal:
lsof -i :<PORT_NUMBER>You may or may not need to run it with sudo. In that case:
sudo lsof -i :<PORT_NUMBER>If I run this command on my system right now to see what’s running on port 3001 I’ll go:
lsof -i :3001This is the output:
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
node 64575 andreas 26u IPv6 0xdae1ec221413b353 0t0 TCP *:redwood-broker (LISTEN)Kill the process
You need the PID in the output above in order to kill it. In this case it’s 64575, so I will run:
kill -9 20384
That should be it. If you now run lsof -i :<PORT_NUMBER> again you should get no output and the port should be free to use.
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