kill port linux ubuntu

1. download command from https://raw.github.com/abdennour/miscs.sh/master/killport

$ wget https://raw.github.com/abdennour/miscs.sh/master/killport

command code

#!/bin/sh
PNUMPER=$1;
kill -9 `lsof -w -n -i tcp:$PNUMPER| awk '{print $2}'|awk 'END{print}'`;

2. run command (close port 9001)

$ sh killport 9001 

thank you : http://stackoverflow.com/questions/9346211/how-to-kill-a-process-on-a-port-on-ubuntu