I do most of my computer work in Ubuntu, when I need another OS I just use VirtualBox or VMWare Player. Sometimes when I'm in a Linux VM, I want to change to the console or use SysRq keys. I obviously can't just do Ctrl+Alt+F1 because that will switch to the console on my host OS
So my question is: Is there a way to send special key combinations to the guest OS only?
The answer at How to send Ctrl+Alt+F1 (and other special keystrokes) to X window? doesn't answer my question.