How to switch to a TTY in Virtual Box VM? [duplicate]
The keyboard shortcut in VirtualBox to switch to a TTY is (replace X with the number of the TTY you wish to switch to (e.g.: F1 for TTY1)):
Host Key + FX
Normally, the Right Control key is your host key.
I think it's CTRL + ALT + F1 after entering fullscreen mode, and back to GUI by CTRL + ALT + F7.