Bash (short for "Bourne Again SHell") is an interactive command interpreter and command language developed for Unix-like operating systems.¹

Shebang

In computing, a shebang is the character sequence #!, consisting of the characters number sign (also known as sharp or hash) and exclamation mark (also known as bang), at the beginning of a script. It is also called sharp-exclamation, sha-bang, hashbang, pound-bang, or hash-pling.²

Use proper shebang in shell scripts:

#!/usr/bin/env bash
echo $BASH_VERSION

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1. Bash (Unix shell), Wikipedia (2026). ↩︎

2. Shebang (Unix),Wikipedia (2026). ↩︎