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Mastering Linux Shell Scripting

You're reading from   Mastering Linux Shell Scripting A practical guide to Linux command-line, Bash scripting, and Shell programming

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Product type Paperback
Published in Apr 2018
Publisher
ISBN-13 9781788990554
Length 284 pages
Edition 2nd Edition
Languages
Tools
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Authors (2):
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Mokhtar Ebrahim Mokhtar Ebrahim
Author Profile Icon Mokhtar Ebrahim
Mokhtar Ebrahim
Andrew Mallett Andrew Mallett
Author Profile Icon Andrew Mallett
Andrew Mallett
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Toc

Table of Contents (17) Chapters Close

Preface 1. The What and Why of Scripting with Bash FREE CHAPTER 2. Creating Interactive Scripts 3. Conditions Attached 4. Creating Code Snippets 5. Alternative Syntax 6. Iterating with Loops 7. Creating Building Blocks with Functions 8. Introducing the Stream Editor 9. Automating Apache Virtual Hosts 10. AWK Fundamentals 11. Regular Expressions 12. Summarizing Logs with AWK 13. A Better lastlog with AWK 14. Using Python as a Bash Scripting Alternative 15. Assessments 16. Other Books You May Enjoy

Summary

To any administrator, script reuse will always be upmost in the quest for efficiency. Using vim at the command line can make for very quick and effective editing of a script and we can save typing in the use of abbreviations. These are best set within a user's personal .vimrc file and are defined with the abbr control. Beyond abbreviations, we can see the sense in using code snippets. These are pre-prepared blocks of code that can be read into the current script.

Also, we had a look at the value in using color at the command line where a script will provide feedback. In the first look, these color codes are not the friendliest, but we can simplify the process by using variables. We created variables with color codes and saved them to a file and by using source command, these variables will be available to our current environment.

Finally, we saw how to create code...

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