How do we disable the Stop+A keyboard combination (or abort sequence) for a Sun sparc server/workstation? Read on to find out…

But first, why would we want to do that?

The Stop - A key combination for sparc will send a BREAK signal to the processor and will stop what ever the server is doing. The screen (if in GUI) might freeze and it will drop you to an ‘ok>’ prompt. From this prompt you can sync the system and power it down if you wish.

Another way to put you in the Open Boot - ‘ok’ - prompt is by inserting or unplugging a keyboard on a running Sun system

So, here’s how to do it:

kbd -a disable

You could also modify the /etc/default/keyboard file:

From:
#KEYBOARD_ABORT=disable

To:
KEYBOARD_ABORT=enable