#!/bin/sh
if test $(id -u) != 0; then
 echo Error: You must be root to run this script!
 exit 1 
fi
if ! test -e /etc/network/interfaces.1st; then
 cp /etc/network/interfaces /etc/network/interfaces.1st
fi
perl -pi -e 's/^[\s]*gateway.*[\n]//g' /etc/network/interfaces
/etc/init.d/networking restart