control-alt-delete(7) - Linux man page
Name
control-alt-delete - event signalling console press of Control-Alt-DeleteSynopsis
control-alt-delete [ENV]...Description
The control-alt-delete event is generated by the Upstart init(8) daemon when the Control-Alt-Delete key combination is pressed on the console.Typically this combination is used to safely reboot the machine.
In the default Upstart configuration handling of this event is provided by the /etc/init/control-alt-delete.conf task which runs the shutdown(8) tool.
Example
A task to be run on Control-Alt-Delete might use:start on control-alt-delete