Book Image

Mastering Linux Shell Scripting

By : Andrew Mallett
Book Image

Mastering Linux Shell Scripting

By: Andrew Mallett

Overview of this book

Shell scripting is a quick method to prototype a complex application or a problem by automating tasks when working on Linux-based systems. Using both simple one-line commands and command sequences complex problems can be solved with ease, from text processing to backing up sysadmin tools. In this book, you’ll discover everything you need to know to master shell scripting and make informed choices about the elements you employ. Get to grips with the fundamentals of creating and running a script in normal mode, and in debug mode. Learn about various conditional statements' code snippets, and realize the power of repetition and loops in your shell script. Implement functions and edit files using the Stream Editor, script in Perl, program in Python – as well as complete coverage of other scripting languages to ensure you can choose the best tool for your project.
Table of Contents (21 chapters)
Mastering Linux Shell Scripting
About the Author
About the Reviewer


In this chapter, we have seen how we can extend sed into some very cool scripts that have allowed us to extract data from files, uncomment selected lines and write new configurations. Not stopping at that we also saw how we could use sed with script that inserts new lines into existing files. I thought that sed will very quickly become your friend and we have created some powerful scripts to support the learning experience.

You may already know this but sed has a big brother awk. In the next chapter, we are going to see how we can use awk to extract data from files.