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


We have had three Chapters where we have used awk. Starting with some basic usage statements in Chapter 10, Awk Fundamentals where we became comfortable. Within Chapter 11, Summarizing Logs with Awk and this chapter we started building our bespoke applications.

Specifically, in this chapter we saw how we could create reports from the output of standard commands, such as lastlog. We saw that we could negate ranges and additionally make use of the OR statement. We then built the application that will allow us to query XML data.

For the next two chapters, we will move away from the shell scripts and look at scripts using perl and Python so we can compare the scripting languages and make appropriate choices.