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
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Summary


Another great chapter that you have firmly under your belt and I hope this was really useful to you. Although, we want to concentrate on using sed, we started with how powerful grep can be both inside and outside our scripts. This led us to the Regular Expressions before taking a look at just a few of the possibilities of sed. Although, we have only just touched sed, we will start extending this in the next chapter were we will expand upon what we have learned. This will take the form of scripting Apache Virtual Hosts by first extracting commented data from the current configuration, uncommenting and writing it to a template. We can then use the template to create new Virtual Hosts. The workhorse of all these operations will be sed and sed scripts.