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Linux Shell Scripting Essentials

Linux Shell Scripting Essentials

By : Sinny Kumari
4.5 (2)
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Linux Shell Scripting Essentials

Linux Shell Scripting Essentials

4.5 (2)
By: Sinny Kumari

Overview of this book

Shell scripting is a quick method to prototype complex applications or problems. Shell scripts are a collection of commands to automate tasks, usually those for which the user has a repeated need, when working on Linux-based systems. Using simple commands or a combination of them in a shell can solve complex problems easily. This book starts with the basics, including essential commands that can be executed on Linux systems to perform tasks within a few nanoseconds. You’ll learn to use outputs from commands and transform them to show the data you require. Discover how to write shell scripts easily, execute script files, debug, and handle errors. Next, you’ll explore environment variables in shell programming and learn how to customize them and add a new environment. Finally, the book walks you through processes and how these interact with your shell scripts, along with how to use scripts to automate tasks and how to embed other languages and execute them.
Table of Contents (10 chapters)
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9
Index

Chapter 5. Customizing the Environment

In a default system, we get certain settings that are preconfigured. As time progresses, we often feel the need to modify some of the default settings provided. Similar needs arise when we are working in a shell to get things done, for example, modifying the environment according to the needs of the application. Some of the features are so irresistible that we may need them every time, for example, the editor of our choice used by an application. While working on an important task, it may happen that we forget a command that we used a few days ago. In such cases, we try to recall that command as soon as possible to get work done. If we can't remember, we consume time and effort searching on the Internet or in text books for the exact command and syntax.

In this chapter, we will see how, by adding or changing the existing environment variables, we can modify the environment as per our application needs. We will also see how a user can...

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