. . . or better parenting through Unix. My son B really got a kick out of this xkcd comic:

So now I have learned to put the concept to good use:

Me: Time to brush your teeth and get ready for bed

B: No, I’m reading

Me: SUDO, brush your teeth.

B: Okay! (jumps up and runs upstairs.)

Works great for now, at least until the novelty wears off in a few days.