I just found out about gpp, which is a neat text preprocessor for quick and low-power templating. Which sparked me to look for other commands that are super cool but might not show up in the beginner tutorials.

So here it is: what are your favorite commands that might not be as popular? Bonus points if they come pre-packaged on your favorite OS. Big bonus if you don’t have to install them with a language-specific package manager like pop, gem, or npm—not because there’s anything wrong with u them. I’m just trying to steer this away from a pile of “just npm install kitchen-sink-robot-suit!”