Module Title: dgt_bash03 – Variables
module Description:
Welcome to the “dgt_bash03 – Variables,” a comprehensive module designed for those looking to deepen their understanding of variables in Bash scripting. This module is an essential component for anyone interested in enhancing their script automation and customization capabilities using one of the most powerful tools available on Unix-like systems.
module Objectives:
- Understand the fundamental concepts of variables within Bash.
- Learn how to declare, assign, and utilize different types of variables effectively.
- Explore variable scope and lifespan to ensure efficient memory usage and avoid common pitfalls in scripting.
- Master examples of variable declaration for practical application in real-world scenarios.
Key Topics Covered:
- Introduction to Variables in Bash
- What are variables?
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Why use variables in scripts?
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Basic Variable Declaration and Assignment
- Simple assignment syntax
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Best practices for naming variables
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Examples of Variable Declaration
- Integer and string variable declarations
- Reading input from users via command line or script arguments
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Exporting variables for child processes
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Advanced Variable Manipulation
- Using special variables e.g.,
$?,$$,$@ - String manipulation techniques
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Array variables and their operations
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Variable Scope and Lifetime
- Understanding local vs global scope
- Function-local variables
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Environment variables and their persistence
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Practical Use Cases and Examples
- Case studies on using variables in scripts for automation tasks
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Real-world examples demonstrating the power of variable usage
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Common Pitfalls and How to Avoid Them
- Common errors in variable declaration and usage
- Debugging tips for scripts involving variables
Target Audience:
This module is ideal for system administrators, DevOps engineers, software developers, or any IT professionals looking to improve their Bash scripting skills. No prior experience with shell scripting is required; however, a basic understanding of command-line operations will be beneficial.
By the end of this module, participants will have gained practical knowledge and confidence in using variables within Bash scripts, allowing them to create more efficient and effective automation solutions.
Join us on this journey into the world of Bash scripting variables and take your skills to the next level!
The students can push their exercises to the Academy DevOps & SRE GIT project. For this module, create a folder with your username as its name in the following subfolder: https://github.com/Garanti-Del-Talento/gdt_academy