Bash (Bourne Again Shell) is an interpreter responsible for processing commands on the command line of Unix systems. Learn the basics of Bash.

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Bash (Bourne Again Shell) is an interpreter responsible for processing commands on the command line of Unix systems. You can use Bash on Linux and MacOS machines and it is even available on Windows 10 machines through the Windows Subsystem for Linux. Bash scripting is used to automate everyday remedial tasks a computer scientist may take on.

An Introduction to Bash Scripting

How to Create a Backup Management Script in Bash

This is a great article! Well done!
In case that you want to learn more about Bash scripting besides creating a file and defining a variable, I would recommend this free ebook here:
<a href="https://github.com/bobbyiliev/introduction-to-bash-scripting" target="_blank" rel="noopener nofollow">https://github.com/bobbyiliev/introduction-to-bash-scripting</a>