Learning Linux Shell Scripting - Second Edition

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

Key Features

• 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

Book Description

Linux is 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 tasks and for testing or product development activities.

This book covers Bash, 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 or 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. As compared to last editions, we have used CentOS distribution instead of Ubuntu Distribution. Linux Shell Scripting is independent of Linux Distributions, but we have tried to educate reader for both the types of distros.Then we will ensure, you understand Shell's interpretation of commands and get a firmer 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 environment. We will also learn about grep, Stream Editor, and Awk, which are very powerful text filters & editors.

Finally, you'll get to understand the capabilities of scripting and learn about using other language scripts such as Python, Pearl, Ruby scripts in Shell Scripts as well as you learn accomplishing Database administration tasks for databases such as MySQL & Oracle

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
• Use existing other language scripts such as Python, Pearl & Ruby in Shell Scripts
• Automate database administration tasks for various databases such as MySQL, Oracle and similar

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

Ganesh Sanjiv Naik is an author, consultant, and corporate trainer for embedded Android, embedded Linux, and the Internet of Things related product development. He completed his computer engineering in 1988. Since then, he has worked in this industry. He has worked on projects including micro-controller based projects to advanced Embedded Android projects. He has more than 20 years of professional experience and project accomplishment in information technology. Ganesh has a passion and deep desire for teaching. He has trained 1,000 engineers in Linux and Android product development. He has developed a lot of training material as well as curriculum for various universities and training institutes. He has an interest in spiritual study and practices such as meditation. He is a certified yoga teacher. His hobbies include yoga and martial arts. He has worked as a corporate trainer for Indian Space Research Organization, Intel, GE, Samsung, Motorola, Penang Skill Development Center (Malaysia), various companies in Singapore as well as various other corporates in India and other countries. He has started a company called Levana Technologies, which works with the Penang Skill Development Center (Malaysia) for consulting and training activities.