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Learning Linux Shell Scripting

You're reading from   Learning Linux Shell Scripting Unleash the power of shell scripts to solve real-world problems by breaking through the practice of writing tedious code

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Product type Paperback
Published in Dec 2015
Publisher
ISBN-13 9781785286216
Length 306 pages
Edition 1st Edition
Tools
Concepts
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Author (1):
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Ganesh Sanjiv Naik Ganesh Sanjiv Naik
Author Profile Icon Ganesh Sanjiv Naik
Ganesh Sanjiv Naik
LinkedIn
Ganesh Sanjiv Naik is an author, consultant, and corporate trainer for embeddednAndroid, embedded Linux, and Internet of Things related product development.nHe completed his computer engineering in 1988. Since then, he has worked in thisnindustry. He has worked on projects including micro-controller based projects tonadvanced Embedded Android projects. He has more than 20 years of professionalnexperience and project accomplishment in information technology.nGanesh has a passion and deep desire for teaching. He has trained 1,000 engineersnin Linux and Android product development. He has developed a lot of trainingnmaterial as well as curriculum for various universities and training institutes.nHe has an interest in spiritual study and practices such as meditation. He is a certifiednyoga teacher. His hobbies include yoga and martial arts.nHe has worked as a corporate trainer for Indian Space Research Organization,nIntel, GE, Samsung, Motorola, Penang Skill Development Center (Malaysia),nvarious companies in Singapore as well as various other corporates in India andnother countries. He has started a company called Levana Technologies, whichnworks with the Penang Skill Development Center (Malaysia) for consulting andntraining activities. If you would like to send feedback, suggestions, or correctionsnin the book, he can be contacted at https://in.linkedin.com/in/naikganesh.nThis book is his real-life experience….nHe has worked as a consultant and corporate trainer in the following skills:n• Internet of Thingsn• Embedded Android, Android internals, and device driver developmentn• USB and PCI device driver development in Linuxn• Embedded Linux and device driver developmentn• Unix Shell scripting with sed and awkn• Embedded C++ and C programmingn• Operating systems, software engineering, and networkingn• Problem solving—analysis, reasoning, and solution techniques fornsoftware engineers
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Toc

Table of Contents (14) Chapters Close

Preface 1. Getting Started and Working with Shell Scripting FREE CHAPTER 2. Drilling Deep into Process Management, Job Control, and Automation 3. Using Text Processing and Filters in Your Scripts 4. Working with Commands 5. Exploring Expressions and Variables 6. Neat Tricks with Shell Scripting 7. Performing Arithmetic Operations in Shell Scripts 8. Automating Decision Making in Scripts 9. Working with Functions 10. Using Advanced Functionality in Scripts 11. System Startup and Customizing a Linux System 12. Pattern Matching and Regular Expressions with sed and awk Index

Chapter 5. Exploring Expressions and Variables

In the last chapter, you learned about how shell interprets any command, which is entered in the terminal or the command line. We also studied command substitution and separators in detail.

In this chapter, we will cover following topics:

  • Working with environment variables
  • Exporting variables
  • Working with read-only variables
  • Working with command line arguments (special variables, set and shift, and getopt)
  • Working with arrays
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Authors (1)

Profile icon Ganesh Sanjiv Naik
Ganesh Sanjiv Naik
LinkedIn icon Github icon
Ganesh Sanjiv Naik is an author, consultant, and corporate trainer for embedded Android, embedded Linux, and 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. If you would like to send feedback, suggestions, or corrections in the book, he can be contacted at https://in.linkedin.com/in/naikganesh. This book is his real-life experience…. He has worked as a consultant and corporate trainer in the following skills: • Internet of Things • Embedded Android, Android internals, and device driver development • USB and PCI device driver development in Linux • Embedded Linux and device driver development • Unix Shell scripting with sed and awk • Embedded C++ and C programming • Operating systems, software engineering, and networking • Problem solving—analysis, reasoning, and solution techniques for software engineers
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See other products by Ganesh Sanjiv Naik

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