On Wed 06 Dec 2017 at 22:52:17 (+0100), Urs Thuermann wrote: > Yesterday, my 10 years old son logged into my laptop running Debian > jessie using his account, and curiously asked if he is allowed to try > the /sbin/reboot command. Knowing I have a Linux system as opposed to > some crappy Win machine, I replied "sure, go ahead and try". Seconds > later I was completely shocked when the machine actually rebooted...
That's a lot of typing! I just type Ctrl-Alt-Backspace Ctrl-Alt-Del to reboot, or tap the power button to shut down. I've also noticed that I don't need to type any password to close the lid. Presumably your son has progressed beyond mischievously holding down the power button. Cheers, David.