#!/usr/bin/env bash

USER=$(whoami)

if [ ! $USER = 'root' ]; then
    echo Sorry you\'re not the boss!
    exit 1;
fi

scheme="$@"
if [ -z $scheme ]; then
    echo Please provide a network scheme!
    exit 1;
fi

if [ -f /etc/network/interfaces.${scheme} ]; then
    cp -f /etc/network/interfaces.${scheme} /etc/network/interfaces
    systemctl restart networking.service && echo Network scheme is $scheme
else
    echo Scheme "$scheme"  does not exist!
    exit 1
fi