I was today years old when I learned about the `at` command in the unix shell??
Very useful for if I want to lazily do something non-critical in the near future. Like I upload a file for a friend, send them the link, tell them it's getting deleted in an hour, and then do
$ echo 'rm the_file' | at now +1 hours
Will this fail in a lot of corner cases? Probably. Do I care? no