hegdepavankumar / shell-scripting-tutorial

Welcome to the "Shell Scripting Zero to Hero" repository, your comprehensive guide to mastering Bash shell scripting for real-world corporate scenarios. Whether you're a beginner looking to automate tedious tasks or an experienced developer aiming to enhance your scripting skills, this tutorial takes you from the basics to hero-level scripting.

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Shell Scripting: A Complete Guide

Welcome to the "Shell Scripting Zero to Hero" repository, your comprehensive guide to mastering Bash shell scripting for real-world corporate scenarios. Whether you're a beginner looking to automate tedious tasks or an experienced Network/Software Engineer aiming to enhance your scripting skills, this tutorial takes you from the basics to hero-level scripting.

🚀 What's Inside:

• Foundational Concepts: Learn the fundamentals of Bash, including basic commands, variables, and data types.
• Control Flow: Master conditional statements and loops for efficient script execution.
• Functions and Arrays: Dive into the world of functions, arrays, and advanced data manipulation.
• File Handling and Text Processing: Explore file operations, regular expressions, and powerful text-processing tools.
• Automation Techniques: Discover how to automate tasks, manage processes, and schedule jobs with cron.
• Security and Best Practices: Write secure scripts, adhere to coding standards, and implement best practices.
• Real-world Examples: Apply your skills to practical examples, from log analysis to system monitoring.
• Version Control and Documentation: Learn to manage scripts with version control and document your code effectively.

👩‍💻 Hands-On Learning: Each section comes with hands-on exercises and real-world scenarios to reinforce your understanding.

🌐 Who Is This For?

• Beginners eager to start their scripting journey.
• Intermediate users seeking to deepen their knowledge.
• Professionals wanting to apply scripting in corporate environments.

📚 Why "Zero to Hero"? This repository is designed to take you from a novice to a scripting hero, providing the tools and knowledge needed to excel in real-world scripting tasks. Absolutely, here are 5 key points for your Bash scripting tutorial:

1. Universal Power of Bash:

   • Highlight the prevalence of Bash on Unix-like systems, making it an essential skill for anyone dealing with networking and system administration.

2. Hands-on Setup:

   • Provide a step-by-step guide for beginners to set up their scripting environment, ensuring they can dive into Bash without unnecessary obstacles.

3. Practical Automation:

   • Showcase real-world examples of how Bash scripting can automate common networking tasks, emphasizing its practical applications for professionals.

4. Modularity for Efficiency:

   • Stress the importance of writing modular scripts, enabling both beginners and professionals to create organized and reusable code for efficient problem-solving.

5. Corporate Impact:

   • Illustrate the value of scripting in a corporate environment, where time-saving automation can lead to increased productivity and smoother network operations.

Ready to become a scripting hero? Clone the repository, follow the tutorials, and start scripting your way to success!

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Table of Contents

Quick-Recap | Linux-cheat-sheet

Prerequisites:

1. Introduction to Bash:

   • What is Bash?
   • Importance of shell scripting in automation.

2. Basic Commands:

   • Basic commands (ls, cd, mkdir, rm, cp, mv, etc.).
   • Understanding file permissions (chmod, chown).

3. Variables and Data Types:

   • Declaring and using variables.
   • String manipulation.
   • Numeric operations.

4. Conditional Statements:

   • if, elif, else statements.
   • Case statements.

5. Loops:

   • for, while, until loops.
   • Loop control statements (break, continue).

6. Functions:

   • Defining and using functions.
   • Passing arguments to functions.
   • Returning values from functions.

7. Arrays:

   • Declaring and accessing arrays.
   • Array manipulation.

8. File Handling:

   • Reading from and writing to files.
   • Checking file existence and type. -File manipulation commands (sed, awk).

9. Input/Output Redirection:

   • Redirecting standard input and output.
   • Using pipes for command chaining.

10. Regular Expressions:

    • Basic regex patterns.
    • grep, sed, and awk for pattern matching and text processing.

11. Error Handling:

    • Handling errors with exit codes.
    • Using trap for signal handling.

12. Environment Variables:

    • Built-in environment variables.
    • Custom environment variables.

13. Debugging Techniques:

    • Using echo and printf for debugging.
    • Setting and using breakpoints.

14. Advanced Scripting Techniques:

    • Managing processes (ps, kill, jobs).
    • Job scheduling with cron.
    • Signal handling.

15. Security Best Practices:

    • Writing secure scripts.
    • Avoiding common pitfalls.

16. Interacting with External Commands:

    • Running external commands from scripts.
    • Capturing and using command output.

17. Real-world Examples:

    • Practical scripts for common tasks (log analysis, data processing, system monitoring).
    • Integration with other tools and technologies.

18. Best Practices:

    • Coding standards.
    • Code reviews and collaboration.

19. Conclusion:

20. Resources for learning more about Bash scripting:

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