Variables script: https://drive.google.com/uc?export=download&id=1Sas4jpt6I56tnr6HOLmWmHZBXs55g_9X

Are you preparing for IT campus placements and want to write professional-grade automation scripts for your DevOps resume? In this tutorial, we level up our Bash Scripting skills by introducing Variables!

Hardcoding values in scripts is a bad practice. We explain how variables act as temporary RAM storage to make your scripts dynamic, reusable, and easy to update. You will learn the correct syntax for assigning values (`SKILL=”DevOps”`) and retrieving them using the dollar sign (`$SKILL`). We then take our previous Apache Web Server deployment script and refactor it completely using industry best practices—placing repeating and changing values at the top of the file. Finally, we cover command interpolation and how to test your newly refactored code in a clean environment.

Topics Covered in this Video:
* Understanding Variables: Temporary RAM storage vs. permanent disk storage.
* Basic Syntax: Storing values without spaces and retrieving them using `$`.
* Command Interpolation: Passing variables directly into Linux commands (e.g., `yum install $PACKAGE`).
* Best Practices: Identifying which hardcoded values should become variables (changing vs. repeating).
* Refactoring the Web Setup Script: Applying variables to URLs, directories, and service names.
* Environment Testing: Tearing down old environments to properly validate updated scripts.

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