Trivia: /bin/false (not surprisingly), exits with a failure. I read some time ago of some *nix (I don't recall which) recognizing that the attempt to start a sh

Trivia: /bin/false (not surprisingly), exits with a failure. I read some time ago of some *nix (I don't recall which) recognizing that the attempt to start a shell (/bin/false) "failed" and helpfully starting /bin/sh for you so you could recover your system. I still use /bin/true as my "not a shell" shell for this reason.