Linux Command Line and Shell Scripting Bible

Code examples

Table of Contents

• Part I: Getting Started with the Linux Command Line

  • Chapter 1: Starting with Linux Shells
  • Chapter 2: Getting to the Shell
  • Chapter 3: Basic Bash Shell Commands
  • Chapter 4: More Bash Shell Commands
  • Chapter 5: Understanding the Shell
  • Chapter 6: Using Linux Environment Variables
  • Chapter 7: Understanding Linux File Permissions
  • Chapter 8: Managing Filesystems
  • Chapter 9: Installing Software
  • Chapter 10: Working with Editors

• Part II: Shell Scripting Basic

  • Chapter 11: Basic Script Building
  • Chapter 12: Using Structured Commands
  • Chapter 13: More Structured Commands
  • Chapter 14: Handling User Input
  • Chapter 15: Presenting Data
  • Chapter 16: Script Control

• Part III: Advanced Shell Scripting

  • [[#Chapter 17: Creating Functions]]
  • Chapter 18: Writing Scripts for Graphical Desktops
  • Chapter 19: Introducing sed and gawk
  • Chapter 20: Regular Expressions
  • Chapter 21: Advanced sed
  • Chapter 22: Advanced gawk k
  • Chapter 23: Working with Alternative Shells

• Part IV: Creating and Managing Practical Scripts

  • Chapter 24: Writing Simple Script Utilities
  • Chapter 25: Getting Organized

Chapter 17: Creating Functions

Key concepts

• Exploring basic script functions
• Returning a value from a function
• Using variables in functions
• Investigating array variables and functions
• Considering function recursion
• Creating a library
• Using functions on the command line

Personal thoughts

• In both simple and complex scripts there is a need to repeat or reuse same block of code.
• How can this be applied?
• Reflections, critiques, or takeaways:

Examples or code snippets

function name {
 block of code goes here
}

Questions

• What’s unclear or worth exploring further?

Summary

• Use your own words an summarise the chapter. If using chatGPT to help with summary, don't just copy and paste. Write manually to improve memory.

Reference or additional reading

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