evil.sh

evil.sh is a shell script collection of “subtle and not-so-subtle shell tweaks that will slowly drive people insane,” as the README states. It is a playful (some might say mischievous) set of shell customizations, aliases, overrides or environment changes intended for fun (or prank) usage—e.g., customizing the shell prompt, redirecting commands, changing behaviors of common commands in subtle ways. The repository warns that it is purely for entertainment and that the author is not responsible for its usage. Because it’s simply sourced (e.g., in .bash_profile), the tweaks affect your shell session directly. Use cases range from demonstration, novelty setups, or creative surprises in developer environments. While it doesn’t aim for production utility the way a library does, it shows how shell behavior can be modulated in interesting ways.