And what exactly will sudo rm -rf do?

The furor around the sudo rm -rf clowns has subsided (but will no doubt resurface in the future), but just for the record, what will that command do?

Our guinea pig today is the naive and unsuspecting ugly laptop, this time running an arbitrary leftover installation of Lowarch, which I was using to recreate those fbpanel settings for the occasional person who wants to make Openbox look like Gnome (why someone would want to do that, I can’t imagine).