Because Linux can do it. That's why.

sudo apt-get install beep
sleep 5m;beep;beep;beep

My wife called. "Call the order in, but not for 5 minutes."

Sigh. So many different ways to handle this. I don't want to go to my microwave. or my stove. Besides, these things keep wanting you to turn off the beeper after they do it. I could open a calendar app. no. I just want to know when 5 minutes have passed.

And in 5 minutes, I get a beep. or whatever. And there ... it's done.

beep! beep! beep!

of course, I did it by intuition, not the right way. soo um.. beep -r 3 ok? fine.