Linux Scripting Basics
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Learning Linux Shell Scripting
Author: Ganesh Sanjiv Naik
language: en
Publisher: Packt Publishing Ltd
Release Date: 2015-12-31
Unleash the power of shell scripts to solve real-world problems by breaking through the practice of writing tedious code About This Book Learn how to efficiently and effectively build shell scripts and develop advanced applications with this handy book Develop high quality and efficient solutions by writing professional and real-world scripts, and debug scripts by checking and shell tracing A step-by-step tutorial to automate routine tasks by developing scripts from a basic level to very advanced functionality Who This Book Is For This book is ideal for those who are proficient at working with Linux and who want to learn about shell scripting to improve their efficiency and practical skills. By the end of this book, you will be able to confidently use your own shell scripts in the real world. What You Will Learn Familiarize yourself with the various text filtering tools available in Linux Combine the fundamental text and file processing commands to process data and automate repetitive tasks Understand expressions and variables and how to use them practically Automate decision-making and save a lot of time and effort of revisiting code Get to grips with advanced functionality such as using traps and signals and using dialogs to develop screens Start up a system and customize a Linux system Take an in-depth look at regular expressions and pattern matching to understand the capabilities of scripting In Detail Linux is the one of the most powerful and universally adopted OSes. Shell is a program that gives the user direct interaction with the operating system. Scripts are collections of commands that are stored in a file. The shell can read this file and act on the commands as if they were typed on the keyboard. Shell scripting is used to automate day-to-day administration, and for testing or product development tasks. This book covers Bash, GNU Bourne Again SHell, preparing you to work in the exciting world of Linux shell scripting. We start with an introduction to the Shell environment and explain basic commands used in Shell. Next we move on to check, kill, and control the execution of processes in Linux OS. Further, we teach you about the filter tools available in Linux and explain standard output and standard errors devices. Then we will ensure you understand Shell's interpretation of commands and get a firmer grasp so you use them in practice. Next, you'll experience some real-world essentials such as debugging and perform Shell arithmetic fluently. Then you'll take a step ahead and learn new and advanced topics in Shell scripting, such as starting up a system and customizing a Linux system. Finally, you'll get to understand the capabilities of scripting and learn about Grep, Stream Editor, and Awk. Style and approach This practical book will go from the very basics of shell scripting to complex, customized automation. The idea behind this book is to be as practical as possible and give you the look and feel of what real-world scripting is like.
Linux Shell Scripting for Beginners
Have you tried to learn shell scripting on your own, but lack the structure you need to really improve your skills?One of the biggest complaints I hear from students is that most of the book they've taken in the past simply provide information without any context and without any idea of howto put that information to use! This book turns that old, frustrating, and outdated way of learning on its head. It's project-based, which means instead of learning bits and pieces of information, you'll write actual shell scripts that you can use in real-world situations. You get the chance to immediately put what you learn to use so that you fully understand and remember it.In this Linux Shell Scripting for Beginners: A practical guide to Bash scripting, Linux command-line, and Shell programming book you will learn how to: -Name your shell scripts.-Use the proper permissions on your shell scripts.-Create and use variables in your scripts.-Use shell built-in commands and operating system commands.-Make the most out of special variables that are available to you in your scripts.-Make decisions by using if statements and performing several different kinds of tests-Check the exit statuses of commands and why you need to.-Use cryptographic hash functions-Create random data so you can do things like automatically generate strong passwords for user accounts.-Perform the same action or set of actions over a series of data utilizing for loops, while loops, and infinite loops.-Control all types of input and output.-Accept standard input from a user as well as from another program.-Redirect standard output and standard error.-Combine standard output and standard error-Use command pipe lining-Perform text and string manipulation.-Process command line arguments-Creating functions and when to do so.-Parsing, analyzing, and reporting on log files, CSV files, and other data.-Writing scripts that execute commands on other systems.-Much, much, more...
Linux Command Line and Shell Scripting Bible
Talk directly to your system for a faster workflow with automation capability Linux Command Line and Shell Scripting Bible is your essential Linux guide. With detailed instruction and abundant examples, this book teaches you how to bypass the graphical interface and communicate directly with your computer, saving time and expanding capability. This third edition incorporates thirty pages of new functional examples that are fully updated to align with the latest Linux features. Beginning with command line fundamentals, the book moves into shell scripting and shows you the practical application of commands in automating frequently performed functions. This guide includes useful tutorials, and a desk reference value of numerous examples. The Linux command line allows you to type specific shell commands directly into the system to manipulate files and query system resources. Command line statements can be combined into short programs called shell scripts, a practice increasing in popularity due to its usefulness in automation. This book is a complete guide providing detailed instruction and expert advice working within this aspect of Linux. Write simple script utilities to automate tasks Understand the shell, and create shell scripts Produce database, e-mail, and web scripts Study scripting examples ranging from basic to advanced Whether used as a tutorial or as a quick reference, this book contains information that every Linux user should know. Why not learn to use the system to its utmost capability? Linux is a robust system with tremendous potential, and Linux Command Line and Shell Scripting Bible opens the door to new possibilities.