Security researchers have discovered a ludicrously simple way to hack into a number of Linux distributions: Just tap the backspace key 28 times in a row. A team from the Cybersecurity Group at Polytechnic University of Valencia (UPV) in Spain found that doing so for builds utilizing the ubiquitous Grub2 bootloader -- that's to say just about all of them -- immediately bypasses the lock screen, initiates the "Grub rescue shell" and grants the user access to the system for whatever nefarious things they have in mind.