In grub terminal (prior to system booting, in this situation), I have entered cat <a file that was a program? something not human-readable>.
Screenfuls of characters are now being output. Every now and then it stops, outputting --MORE--. What key/s do I press to make it quit cat? I've tried q , Q , Ctrl + Z , Ctrl + C , Ctrl + D , n , N and random others that I don't remember.