I know this sounds crazy but just in-case you like the idea of disabling your Ubuntu desktop’s graphical interface upon start-up and put you in terminal mode. Its very simple no sweat!
Fire-up your terminal and edit with your favorite editor:
sudo nano /etc/default grub
note: to save press CTRL+O and CTRL+X to exit.
look for this line:
change it to:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash text"
then update your grub
sudo reboot now
if you want to use the desktop just type:
Have fun and share your Ubuntu experience.