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Key benefits

Identify the high level steps such as verifying user input, using command lines and conditional statements in creating and executing simple shell scripts

Create and edit dynamic shell scripts to manage complex and repetitive tasks

Learn about scripting in Perl and programming in Python as a BASH scripting alternative with this practical, step-by-step guide

Description

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.

What you will learn

Use the type command to identify the order of command evaluation

Create interactive scripts that prompt for user input

Foster menu structures for operators with little command-line experience

Develop scripts that dynamically edit web configuration files to produce a new virtual host

Write scripts that use AWK to search and reports on log files

Draft effective scripts using functions as building blocks, reducing maintenance and build time

Make informed choices by comparing different script languages such as Perl and Python with BASH

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Amazon verified reviews

SuJo Feb 27, 2016

I was extremely skeptical at first glance; however after reading this book it truly covers each topic with enough detail to give a clear understanding of the tasks at hand. Doing a lot of automation work with frameworks like Puppet which can benefit from shell scripts, and all I can say is wow.. you really need to pickup a copy of this book as it is well worth the cost.

Amazon Verified review

C.P. Feb 26, 2017

This book so far has been very useful and I am very pleased with the contents so far. I have read about 1/3 and so far an A+ from me.

Mark Smith Apr 16, 2016

Great Book and highly recommend.

Perry Nally Mar 02, 2016

Almost all you need, and certainly all you need to get you up and running. Gave me the ins and outs of the bash shell as well as pointed me in the right direction with the intro to Peral and Python as additional resources to use when bash shell does allow my to do what I need. I'll have this book as a reference for a very long time when I start building linux embedded devices. I know I'll be turning to this book for references on creating the scripts I need.

Tim Crothers Mar 10, 2016

Really, really good coverage of bash scripting core fundamentals. Literally one of the best I've read and I've read many of them. I wouldn't go nearly as far as to say complete as some of the other reviews have stated but it definitely does a really good job of getting you started down the road. The only issue I had in the end is the "mastering" part of the title. I don't think any book under 200 pages should claim to provide mastery of a topic, especially one as complex as bash shell scripting, but in the end I decided not to dock it a start because it does such a good job at what it does cover. My preference would be to drop the small sections on Perl and Python. They are topics worthy of their own treatment and the pages could have been put to better use going deeper on shell scripting.

Mastering Linux Shell Scripting: Master the complexities of Bash shell scripting and unlock the power of shell for your enterprise

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