Re: What interrupt does Ctrl+Alt+Delete send PID1?

[post-sysv]

Not sure what you meant by this statement, but you certainly can 
provided PID1 has set explicit signal handlers. This is typically to 
implement global system state events like SAK, emergency and rescue 
shell transitions and indeed often the shutdown procedure.

On 06/11/2015 06:56 PM, Laurent Bercot wrote:
 First, you're not supposed to be able to send signals to process 1.
Only the kernel can do that. So I'm surprised you managed to get it
to work with a kill command, and I'm interested in the details.