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BeagleBone Black Cookbook

You're reading from   BeagleBone Black Cookbook Over 60 recipes and solutions for inventors, makers, and budding engineers to create projects using the BeagleBone Black

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Product type Paperback
Published in Nov 2015
Publisher Packt
ISBN-13 9781783982929
Length 346 pages
Edition 1st Edition
Tools
Concepts
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Author (1):
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Charles A. Hamilton Charles A. Hamilton
Author Profile Icon Charles A. Hamilton
Charles A. Hamilton
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Table of Contents (11) Chapters Close

Preface 1. Setting Up for the First Time 2. Basic Programming Recipes FREE CHAPTER 3. Physical Computing Recipes Using JavaScript, the BoneScript Library, and Python 4. Exploring GNU/Linux Recipes Using Bash, Autotools, Debugger, and systemd 5. Basic Programming Recipes with the Linux Kernel 6. Run Faster, Run Real Time 7. Applied Recipes – Sound, Picture, and Video 8. The Internet of Things 9. The Black in Outer Space Index

The basic shell script


Shell scripts

A shell script has a myriad of purposes on a Linux box. You can have them run at bootup so that they initiate commands or processes without you having to manually start them. They can be used to run a sequence of events. They can manipulate files, execute a program, print text, and walk your dog. Well, the last part is true if your dog is a robot. However, we're getting ahead of ourselves.

It's time for our friend Major Tom. We've missed him, but let's bring him back to earth for a moment with a very simple shell script.

How to do it...

Perform the following steps:

  1. Create a new directory as follows:

    $ mkdir bin
    
  2. Then, let's move to the new directory using the cd command:

    $ cd bin
    
  3. Now, create a new file that will become our shell script, as shown in the following code:

    ~/bin$ sudo nano major_tom_bash_script
    
  4. At the beginning of the file, it's a requirement to tell the shell the kind of script that we'll run so that it can interpret the code accordingly. It...

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83
Tech Concepts
36
Programming languages
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