Hotspot script for ubuntu

This script was tested on both Ubuntu 12.04


#!/bin/sh
# 20141208
# hotspot access point creation for android mobiles in ubuntu 12.04.4; works for laptop to laptop connection as well

zenity --warning --text "Run this script from terminal. \n ./hotspot_install. \n Close dialog box/ESC if you are running via terminal. Else click ok/ENTER."
if [ $? -eq 0 ]
then
    exit
fi

echo "Is ap-hotspot already installed (y/n) ? "
read ch
if [ "$ch" = "n" ]
then
    sudo add-apt-repository ppa:nilarimogard/webupd8
    sudo apt-get update
    sudo apt-get install ap-hotspot
fi


echo "Is ap-hotspot already configured (y/n) ? "
read ch
if [ "$ch" = "n" ]
then
    echo "configure your hotspot. give an access point name and good password"
    sudo ap-hotspot configure
    echo "delete all hotspot connection. Disconnect connected hotspots. Then Network -> Wireless -> Forget/Remove all hotspot. Then press any key to continue..."
    read key
fi

sudo ap-hotspot start

echo "Are you able to obtain ip address in your android mobile (y/n) ? "
read ch
if [ "$ch" = "n" ]
then
    echo "configuring network manager"
    sudo sed -i 's:^dns=dnsmasq:#dns=dnsmasq:gi' /etc/NetworkManager/NetworkManager.conf
    echo "restarting network manager"
    sudo service network-manager restart
    echo "check if following command does not say nameserver 127.0.0.1"
    cat /etc/resolv.conf
    echo "restarting ap-hotspot"
    sudo ap-hotspot stop
    sudo ap-hotspot start
fi