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Linux Shell Scripting Bootcamp

Linux Shell Scripting Bootcamp

By : James K Lewis
3.5 (2)
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Linux Shell Scripting Bootcamp

Linux Shell Scripting Bootcamp

3.5 (2)
By: James K Lewis

Overview of this book

Linux Shell Scripting Bootcamp is all about learning the essentials of script creation, validating parameters, and checking for the existence of files and other items needed by the script. We will use scripts to explore iterative operations using loops and learn different types of loop statements, with their differences. Along with this, we will also create a numbered backup script for backup files. Further, you will get well-versed with how variables work on a Linux system and how they relate to scripts. You’ll also learn how to create and call subroutines in a script and create interactive scripts. The most important archive commands, zip and tar, are also discussed for performing backups. Later, you will dive deeper by understanding the use of wget and curl scripts and the use of checksum and file encryption in further chapters. Finally, you will learn how to debug scripts and scripting best practices that will enable you to write a great code every time! By the end of the book, you will be able to write shell scripts that can dig data from the web and process it efficiently.
Table of Contents (12 chapters)
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11
Index

Chapter 6. Automating Tasks with Scripts

This chapter shows how to automate various tasks using scripts.

The topics covered in this chapter are as follows:

  • How to create a script to automate a task.
  • The proper way to use cron to run the script automatically at specific times.
  • How to use ZIP and TAR to perform compressed backups.
  • Source code examples.

The reader will learn how to create automated scripts.

We talked about the sleep command in Chapter 3, Using Loops and the sleep Command. It can be used to create an automated script (that is, one that runs at a specific time with no user intervention) as long as a few guidelines are followed.

This very simple script will reinforce what we covered in Chapter 3 Using Loops and the sleep Command about using the sleep command for automation:

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