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Learn Linux Shell Scripting – Fundamentals of Bash 4.4

You're reading from   Learn Linux Shell Scripting ‚àö¬¢‚Äö√ᬮ‚Äö√Ñ√∫ Fundamentals of Bash 4.4 A comprehensive guide to automating administrative tasks with the Bash shell

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Product type Paperback
Published in Dec 2018
Publisher Packt
ISBN-13 9781788995597
Length 452 pages
Edition 1st Edition
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Author (1):
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Sebastiaan Tammer Sebastiaan Tammer
Author Profile Icon Sebastiaan Tammer
Sebastiaan Tammer
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Table of Contents (20) Chapters Close

Preface 1. Introduction FREE CHAPTER 2. Setting Up Your Local Environment 3. Choosing the Right Tools 4. The Linux Filesystem 5. Understanding the Linux Permissions Scheme 6. File Manipulation 7. Hello World! 8. Variables and User Input 9. Error Checking and Handling 10. Regular Expressions 11. Conditional Testing and Scripting Loops 12. Using Pipes and Redirection in Scripts 13. Functions 14. Scheduling and Logging 15. Parsing Bash Script Arguments with getopts 16. Bash Parameter Substitution and Expansion 17. Tips and Tricks with Cheat Sheet 18. Assessments 19. Other Books You May Enjoy

Keep It Simple, Stupid (KISS)


The KISS principle is a great way to approach shell scripting. While it might come across as a bit harsh, the spirit in which it is given is important: it should only be considered great advice. Further advice is given in the Zen of Python, the design principles on which Python rests:

  • Simple is better than complex
  • Complex is better than complicated
  • Readability counts

There are about 17 more aspects in the Zen of Python, but these three are the most relevant for Bash scripting as well. The last one, 'Readability counts', should be obvious by now. However, the first two, 'Simple is better than complex' and 'Complex is better than complicated' are closely related to the KISS principle. Keeping things simple is a great goal, but if that is not possible, a complex solution is always better than a complicated one (no one likes complicated scripts!).

There are a few things you can keep in mind when writing scripts:

  • If the solution you're cooking up seems to get very complicated...
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