Kill process holding port provided by argument, defaults to port 80

kill_by_port.bash

#!/bin/bash
PORT=:${1:-80}
echo "Searching for process listening on port $PORT to kill..."
PROCESS_PID=$(lsof -ti $PORT)
if [$PROCESS_PID -eq ""]
then
	echo "Process helding port $PORT not found, exit"
	exit 0
fi
echo "Found PID $PROCESS_PID, killing process"
kill -9 $PROCESS_PID