Learning Linux Shell Scripting

Unleash the power of shell scripts to solve real-world problems by breaking through the practice of writing tedious code

About This Book

Learn how to efficiently and effectively build shell scripts and develop advanced applications with this handy book
Develop high quality and efficient solutions by writing professional and real-world scripts, and debug scripts by checking and shell tracing
A step-by-step tutorial to automate routine tasks by developing scripts from a basic level to very advanced functionality
Who This Book Is For
This book is ideal for those who are proficient at working with Linux and who want to learn about shell scripting to improve their efficiency and practical skills. By the end of this book, you will be able to confidently use your own shell scripts in the real world.

What You Will Learn

Familiarize yourself with the various text filtering tools available in Linux
Combine the fundamental text and file processing commands to process data and automate repetitive tasks
Understand expressions and variables and how to use them practically
Automate decision-making and save a lot of time and effort of revisiting code
Get to grips with advanced functionality such as using traps and signals and using dialogs to develop screens
Start up a system and customize a Linux system
Take an in-depth look at regular expressions and pattern matching to understand the capabilities of scripting

In Detail

Linux is the one of the most powerful and universally adopted OSes. Shell is a program that gives the user direct interaction with the operating system. Scripts are collections of commands that are stored in a file. The shell can read this file and act on the commands as if they were typed on the keyboard. Shell scripting is used to automate day-to-day administration, and for testing or product development tasks.

This book covers Bash, the GNU Bourne Again SHell, preparing you to work in the exciting world of Linux shell scripting. We start with an introduction to the Shell environment and explain basic commands used in Shell. Next we move on to check, kill, and control the execution of processes in Linux OS. Further, we teach you about the filter tools available in Linux and explain standard output and standard errors devices.

Then we will ensure you understand Shell's interpretation of commands and get a firm grasp so you use them in practice. Next, you'll experience some real-world essentials such as debugging and perform Shell arithmetic fluently. Then you'll take a step ahead and learn new and advanced topics in Shell scripting, such as starting up a system and customizing a Linux system. Finally, you'll get to understand the capabilities of scripting and learn about Grep, Stream Editor, and Awk.