Bash vs Lean

Bash (Bourne Again Shell) is the default command-line shell on most Linux distributions and macOS. It provides scripting capabilities, job control, command history, and programmable completion for interactive and automated system administration.

Lean is functional programming language and interactive theorem prover, used for formal mathematical proofs and verified software. It provides comprehensive features for programming language workflows. The tool is actively maintained with regular updates and strong community/vendor support.