The instructions in this article should work with any Linux distribution that uses systemd (for the permanent mode below) and GNU GRUB (for the temporary mode), but I personally only tried this with Debian, Ubuntu, Manjaro and Fedora.
Booting in console mode (text mode / tty) allows you to login to your system from the command line (as a regular user or as the root user if it's enabled), without using a graphical user interface. This is useful in case your system fails to boot when using the graphical mode, or maybe you have a computer running Linux for which you don't regularly use the GUI and ssh into it, so you'd like to save some system resources by booting in text mode. But regardless of the reason, this article shows you how to boot to console / text / tty on Linux.