Failure of reboot after update

[Xen]

Cody Smith schreef op 12-10-2016 2:07:
> pretty sure ctrl-alt-del isn't used in Linux, it's usually a Windows
> thing.

If you press ctrl-alt-F1 to get some TTY prompt (text screen) and then 
press ctrl-alt-del you will see that it does at least something ;-).

(which is instantly rebooting your computer, before you try and then 
accuse me of lost work :p).

Also I think the BIOS may also respond to ctrl-alt-del.