sudo kill -9 `sudo lsof -t -i:9001`
sudo kill -9 `sudo lsof -t -i:{PORT_NUMBER}`sudo kill -9 `sudo lsof -t -i:3002`sudo kill -9 `sudo lsof -t -i:8080`sudo kill -9 $(sudo lsof -t -i:9001)
sudo kill 'sudo lsof -t -i:9001'
sudo kill -9 `sudo lsof -t -i:8000`sudo kill -9 $(sudo lsof -t -i:4000)
fuser -n tcp -k 4000
You want to use backtick not regular tick:
sudo kill -9 `sudo lsof -t -i:9001`
If that doesn't work you could also use $() for command interpolation:
sudo kill -9 $(sudo lsof -t -i:9001)
fuser -n tcp -k 9001
fuser -n tcp -k 9001fuser -n tcp -k 9001fuser -n tcp -k 9001fuser -n tcp -k 9001Kill specific port