What is a shebang?

A shebang is the first line in a script file that indicates which interpreter should be used to execute the script. It starts with #! followed by the path to the interpreter.

For example, in a Bash script, the shebang looks like this:

#!/bin/bash

This line tells the system to use the Bash shell to run the script. Shebangs are important because they ensure that the script is executed with the correct interpreter, regardless of the user's current shell environment.