Kill a process on a port. Defaults to 3000 (Rails)

killport.sh

killport() {
  if [ -n "${1}" ]; then
    port=$1
  else
    # default (Rails-centric)
    port="3000"
  fi
  pid=`lsof -wni tcp:$port | awk 'NR==2 { print $2 }'`
  if [ -n "${pid}" ]; then
    kill -9 $pid
    echo "Killed process $pid"
  else
    echo "No processes were found listening on tcp:$port"
  fi
}