Have you ever had the issue of wanting to go into the console of a Linux Virtual Machine that is running at RUNLEVEL 5 (GUI) - because you are one of those Linux geeks who think that GUI is for the weak?

Seriously though - sometimes you need to access the console - to try and fix up something that cannot be done in the GUI.

On a Linux host you would usually press CTRL+ALT+F1 (of Fx - depending on which console you would like). It doesn't work does it?

Hold Ctrl+Alt and hit Space and then F1 (or Fx) without releasing Ctrl+Alt.
This will invoke the Ctrl+Alt+F1 on the guest OS.