https://askubuntu.com/questions/859630/how-to-start-ubuntu-in-console-mode


Yes you can. As described here (ubuntuhandbook.org - Boot into text console ubuntu) you need to edit /etc/default/grub to have the next boot end up in text mode. In summary you will set these parameters:

GRUB_CMDLINE_LINUX_DEFAULT="text"
GRUB_TERMINAL=console
After saving changes you need to run:

sudo update-grub
sudo systemctl enable multi-user.target --force
sudo systemctl set-default multi-user.target
Undoing text-mode
To undo sudo systemctl set-default multi-user.target simply type

sudo systemctl enable graphical.target --force
sudo systemctl set-default graphical.target