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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
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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
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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

Compiler and interpreter – difference in process

In any program development, the following are the two options:

  • Compilation: Using a compiler-based language such as C, C++, Java, and other similar languages
  • Interpreter: Using interpreter-based languages such as Bash Shell scripting.

When we use a compiler-based language, we compile the complete source code, and as a result of compilation, we get a binary executable file. We then execute the binary to check the performance of our program.

On the contrary, when we develop the Shell script, such as an interpreter-based program, every line of the program is input to Bash shell. The lines of Shell script are executed one by one sequentially. Even if the second line of a script has an error, the first line will be executed by the shell interpreter.

You have been reading a chapter from
Learning Linux Shell Scripting
Published in: Dec 2015
Publisher:
ISBN-13: 9781785286216
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