You will require an Ubuntu 18.04 Linux virtual machine to follow along with the book. We will guide you through setting this up during in the second chapter. You will only truly learn shell scripting if you follow along with all code examples. The entire book has been written with this in mind, so be sure to follow this advice!
To get the most out of this book
Download the example code files
You can download the example code files for this book from your account at www.packtpub.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.
You can download the code files by following these steps:
- Log in or register at www.packtpub.com.
- Select the SUPPORT tab.
- Click on Code Downloads & Errata.
- Enter the name of the book in the Search box and follow the onscreen instructions.
Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:
- WinRAR/7-Zip for Windows
- Zipeg/iZip/UnRarX for Mac
- 7-Zip/PeaZip for Linux
The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Learn-Linux-Shell-Scripting-Fundamentals-of-Bash-4.4. In case there's an update to the code, it will be updated on the existing GitHub repository.
We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!
Download the color images
We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://www.packtpub.com/sites/default/files/downloads/9781788995597_ColorImages.pdf.
Conventions used
There are a number of text conventions used throughout this book.
CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Let's try to copy the /tmp/ directory into our home directory."
A block of code is set as follows:
#!/bin/bash
echo "Hello World!"
When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:
reader@ubuntu:~/scripts/chapter_10$ grep 'use' grep-file.txt
We can use this regular file for testing grep.
but in the USA they use color (and realize)!
Any command-line input or output is written as follows:
reader@ubuntu:~/scripts/chapter_10$ grep 'e.e' character-class.txt
eee
e2e
e e
Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Click the Install button and watch the installation."
Warnings or important notes appear like this.
Tips and tricks appear like this.
