Book Image

Mastering Linux Shell Scripting

By : Andrew Mallett
Book Image

Mastering Linux Shell Scripting

By: Andrew Mallett

Overview of this book

Shell scripting is a quick method to prototype a complex application or a problem by automating tasks when working on Linux-based systems. Using both simple one-line commands and command sequences complex problems can be solved with ease, from text processing to backing up sysadmin tools. In this book, you’ll discover everything you need to know to master shell scripting and make informed choices about the elements you employ. Get to grips with the fundamentals of creating and running a script in normal mode, and in debug mode. Learn about various conditional statements' code snippets, and realize the power of repetition and loops in your shell script. Implement functions and edit files using the Stream Editor, script in Perl, program in Python – as well as complete coverage of other scripting languages to ensure you can choose the best tool for your project.
Table of Contents (21 chapters)
Mastering Linux Shell Scripting
About the Author
About the Reviewer

Enhancing learning with simple scripts

Our scripts are still a little trivial and we have not looked at conditional statements, so we can test for correct input, but let's take a look at some simple scripts that we can build with some functionality.

Backing-up with scripts

Now that we have created some scripts, we may want to back these up in a different location. If we create a script to prompt us, we can choose the location and the type of files that we want to backup.

Consider the following script for your first practice. Create the script and name it as $HOME/

# Author: @theurbanpenguin
# Web:
# Script to prompt to back up files and location
# The files will be search on from the user's home
# directory and can only be backed up to a directory
# within $HOME
# Last Edited: July 4 2015
read -p "Which file types do you want to backup " file_suffix
read -p "Which directory do you want to backup to " dir_name
# The next lines creates the directory...