Search icon CANCEL
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Mastering Linux Shell Scripting

You're reading from   Mastering Linux Shell Scripting Master the complexities of Bash shell scripting and unlock the power of shell for your enterprise

Arrow left icon
Product type Paperback
Published in Dec 2015
Publisher
ISBN-13 9781784396978
Length 198 pages
Edition 1st Edition
Tools
Arrow right icon
Author (1):
Arrow left icon
Andrew Mallett Andrew Mallett
Author Profile Icon Andrew Mallett
Andrew Mallett
Arrow right icon
View More author details
Toc

Table of Contents (16) Chapters Close

Preface 1. 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 sed 9. Automating Apache Virtual Hosts 10. Awk Fundamentals 11. Summarizing Logs with Awk 12. A Better lastlog with Awk 13. Using Perl as a Bash Scripting Alternative 14. Using Python as a Bash Scripting Alternative Index

Summary

This marks the end of the chapter and I am sure that you might have found this useful. Especially for those making a start with bash scripting, this chapter must have built a firm foundation on which you can build your knowledge.

We began by ensuring that bash is secure and not susceptible to embedded functions shell-shock. With bash secured, we considered the execution hierarchy where aliases, functions, and so on are checked before the command; knowing this can help us plan a good naming structure and a path to locate the scripts.

Soon we were writing simple scripts with static content but we saw how easy it was to add flexibility using arguments. The exit code from the script can be read with the $? variable and we can create a command line list using || and &&, which depends on the success or failure of the preceding command in the list.

Finally, we closed the chapter by looking at debugging the script. Its not really required when the script is trivial, but it will be useful later when complexity is added.

In the next chapter, we will be creating interactive scripts that read the user's input during script execution.

You have been reading a chapter from
Mastering Linux Shell Scripting
Published in: Dec 2015
Publisher:
ISBN-13: 9781784396978
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime