This is a shirt with a Linux cheat sheet printed upside-down, so you can glance down at it while hacking. Aimed at the non-guru, it’s mainly an overview of useful programs and in some cases handy arguments, and includes a guide to regular expressions. We recommend wearing this to any Linux job interview that involves a test. You can check out how observant they are, and also what their sense of humor is like. We also recommend bringing a change of clothes, in case they make you take it off.