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Learning Linux Shell scripting : unleash the power of Shell scripts to solve real-world problems by breaking through the practice of writing tedious code /
Annotation
| Clasificación: | Libro Electrónico |
|---|---|
| Autor principal: | |
| Formato: | Electrónico eBook |
| Idioma: | Inglés |
| Publicado: |
Birmingham, UK :
Packt Publishing,
2015.
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| Colección: | Community experience distilled.
|
| Temas: | |
| Acceso en línea: | Texto completo Texto completo |
MARC
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| 100 | 1 | |a Naik, Ganesh Sanjiv, |e author. | |
| 245 | 1 | 0 | |a Learning Linux Shell scripting : |b unleash the power of Shell scripts to solve real-world problems by breaking through the practice of writing tedious code / |c Ganesh Sanjiv Naik. |
| 264 | 1 | |a Birmingham, UK : |b Packt Publishing, |c 2015. | |
| 300 | |a 1 online resource | ||
| 336 | |a text |b txt |2 rdacontent | ||
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| 490 | 1 | |a Community experience distilled | |
| 500 | |a Includes index. | ||
| 588 | 0 | |a Online resource; title from cover page (Safari, viewed January 19, 2016). | |
| 520 | 8 | |a Annotation |b Unleash the power of shell scripts to solve real-world problems by breaking through the practice of writing tedious codeAbout 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 functionalityWho This Book Is ForThis 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 scriptingIn DetailLinux 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. | |
| 505 | 0 | |a Cover; Copyright; Credits; About the Author; Acknowledgments; About the Reviewers; www.PacktPub.com; Table of Contents; Preface; Chapter 1: Getting Started and Working with Shell Scripting; Comparison of Shells; Tasks done by Shell; Working in Shell; Learning basic Linux commands; Our first script -- Hello World; Compiler and interpreter -- difference in process; When not to use scripts; Various directories; Working more effectively with Shell -- basic commands; Working with permissions; Changing file permissions; Command chmod; Technique one -- the symbolic method. | |
| 505 | 8 | |a Technique two -- the numeric methodSetting umask; Setuid; Setgid; Sticky bit; Summary; Chapter 2: Drilling Deep into Process Management, Job Control, and Automation; Introducing process basics; Monitoring processes using ps; Process management; Process monitoring tools -- top, iostat, and vmstat; Understanding at -- Understanding crontab -- Summary; Chapter 3: Using Text Processing and Filters in Your Scripts; Text filtering tools; Head and tail; The diff command; The cut command; The paste command; The join command; The uniq command; The comm command; The tr command; IO redirection. | |
| 505 | 8 | |a Exporting variablesWorking with read-only variables; Working with command line arguments (special variables, set and shift, getopt); Understanding set; Understanding shift; Resetting positional parameters; Understanding getopts; Understanding default parameters; Working with arrays; Creating an array and initializing it; Accessing array values; Summary; Chapter 6: Neat Tricks with Shell Scripting; Interactive Shell scripts -- reading user input; Summarizing the read command with options; The here document and the <<operator; The here operator with the sort command. | |
| 505 | 8 | |a The here operator with the wc commandThe utility ed and here operator; A script for sending messages to all logged-in users; Using the <<here operator for FTP usage and data transfer; Turning off variable substitution; The here string and the <<<operator; File handling; Introducing file handling; Using exec to assign file descriptor (fd) to file; Understanding the opening, writing, and closing of a file; Understanding reading from a file; Understanding reading and writing to a file; Using command read on file descriptor (fd); Reading from one file and writing to another file. | |
| 590 | |a eBooks on EBSCOhost |b EBSCO eBook Subscription Academic Collection - Worldwide | ||
| 590 | |a O'Reilly |b O'Reilly Online Learning: Academic/Public Library Edition | ||
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| 776 | 0 | 8 | |i Print version: |a Naik, Ganesh S. |t Learning Linux Shell Scripting. |d Birmingham : Packt Publishing, ©2015 |
| 830 | 0 | |a Community experience distilled. | |
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