Linux Shell Scripting Bootcamp

A quick and straightforward approach to writing shell scripts to accomplish different types of tasks on a Linux system.About This BookUnderstand expressions and variables and how to use them practicallyFamiliarize yourself with the various text filtering tools available in LinuxA fast-paced and concise guide that gets you well versed with linux shell scripting.Who This Book Is ForThis book is for both GNU/Linux users who want to do amazing things with the shell and for advanced users looking for ways to make their lives with the shell more productive.What You Will LearnGet acquainted with the basics of a shell script to serve as a refresher for more advanced topicsLearn different ways to create and run a scriptDiscuss the passing and verification of parameters, along with the verification of other items.Understand the different forms of conditions and loops, and go over the sleep command in detailLearn about different ways to handle the reporting of return codesCreate an interactive script by reading the keyboard and use subroutines and interruptsCreate scripts to perform backups and go over the use of encryption tools and checksumsUse wget and curl in scripts to get data directly from the InternetIn DetailLinux 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.Style and approachThis book is all about fast and intensive learning. This means we don't waste time in helping readers get started. The new content is basically about filling in with highly-effective examples to build new things, solving problems in newer and unseen ways, and solving real-world examples.