I'm currently logged in (locally) to a machine and was running in a TTY session without having started an X server. I accidentally hit Ctrl-Alt-F7 bringing me to where the graphical shell would be if it was running. The trouble is, I can't get back. I assume going to another TTY is forbidden using the standard Ctrl-Alt-F to protect students who have logged in to KDE or whatever, locked the screen, but don't realize that anyone could come along and Ctrl-Alt-F1 into their TTY session. The trouble is that there is no X server running, and so I can't exit from it, and am stuck in the Ctrl-Alt-F7 TTY which just has a cursor blinking at the top left of the screen.
Is there another way to switch currently-viewed TTY? How can I get out of this?
Things that do not work: