vivek is correct, there is no /etc/inittab file and /etc/event.d/rc-default is default upstart config file. After above modification type the command
Code:
sudo apt-get install rcconf
sudo rcconf
Turn off GDM or Gnome and save change and reboot the system. Rcconf allows you to control which services are started when the system boots up or reboots. It displays a menu of all the services which could be started at boot. The ones that are configured to do so are marked and you can toggle individual services on and off. So you will be dropped into text mode and no GUI.