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Beebe N., Robbins A. - Classic Shell Scripting [2005, CHM, ENG]

Сообщение Солнышко » 31 янв 2018, 21:22

Classic Shell Scripting
Год выпуска: 2005
Автор: Nelson H.F. Beebe, Arnold Robbins
Издательство: O'Reilly
ISBN: 0-596-00595-4
Формат: CHM
Качество: OCR без ошибок
Количество страниц: 560
Описание: An essential skill for Unix users and system administrators, shell scripts let you easily crunch data and automate repetitive tasks, offering a way to quickly harness the full power of any Unix system. This book provides the tips, tricks, and organized knowledge you need to create excellent scripts, as well as warnings of the traps that can turn your best efforts into bad shell scripts.
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Copyright
     Foreword
     Preface
        Intended Audience
        What You Should Already Know
        Chapter Summary
        Conventions Used in This Book
        Code Examples
        Unix Tools for Windows Systems
        Safari Enabled
        We'd Like to Hear from You
        Acknowledgments
       Chapter 1.  Background
        Section 1.1.  Unix History
        Section 1.2.  Software Tools Principles
        Section 1.3.  Summary
       Chapter 2.  Getting Started
        Section 2.1.  Scripting Languages Versus Compiled Languages
        Section 2.2.  Why Use a Shell Script?
        Section 2.3.  A Simple Script
        Section 2.4.  Self-Contained Scripts: The #! First Line
        Section 2.5.  Basic Shell Constructs
        Section 2.6.  Accessing Shell Script Arguments
        Section 2.7.  Simple Execution Tracing
        Section 2.8.  Internationalization and Localization
        Section 2.9.  Summary
       Chapter 3.  Searching and Substitutions
        Section 3.1.  Searching for Text
        Section 3.2.  Regular Expressions
        Section 3.3.  Working with Fields
        Section 3.4.  Summary
       Chapter 4.  Text Processing Tools
        Section 4.1.  Sorting Text
        Section 4.2.  Removing Duplicates
        Section 4.3.  Reformatting Paragraphs
        Section 4.4.  Counting Lines, Words, and Characters
        Section 4.5.  Printing
        Section 4.6.  Extracting the First and Last Lines
        Section 4.7.  Summary
       Chapter 5.  Pipelines Can Do Amazing Things
        Section 5.1.  Extracting Data from Structured Text Files
        Section 5.2.  Structured Data for the Web
        Section 5.3.  Cheating at Word Puzzles
        Section 5.4.  Word Lists
        Section 5.5.  Tag Lists
        Section 5.6.  Summary
       Chapter 6.  Variables, Making Decisions, and Repeating Actions
        Section 6.1.  Variables and Arithmetic
        Section 6.2.  Exit Statuses
        Section 6.3.  The case Statement
        Section 6.4.  Looping
        Section 6.5.  Functions
        Section 6.6.  Summary
       Chapter 7.  Input and Output, Files, and Command Evaluation
        Section 7.1.  Standard Input, Output, and Error
        Section 7.2.  Reading Lines with read
        Section 7.3.  More About Redirections
        Section 7.4.  The Full Story on printf
        Section 7.5.  Tilde Expansion and Wildcards
        Section 7.6.  Command Substitution
        Section 7.7.  Quoting
        Section 7.8.  Evaluation Order and eval
        Section 7.9.  Built-in Commands
        Section 7.10.  Summary
       Chapter 8.  Production Scripts
        Section 8.1.  Path Searching
        Section 8.2.  Automating Software Builds
        Section 8.3.  Summary
       Chapter 9.  Enough awk to Be Dangerous
        Section 9.1.  The awk Command Line
        Section 9.2.  The awk Programming Model
        Section 9.3.  Program Elements
        Section 9.4.  Records and Fields
        Section 9.5.  Patterns and Actions
        Section 9.6.  One-Line Programs in awk
        Section 9.7.  Statements
        Section 9.8.  User-Defined Functions
        Section 9.9.  String Functions
        Section 9.10.  Numeric Functions
        Section 9.11.  Summary
       Chapter 10.  Working with Files
        Section 10.1.  Listing Files
        Section 10.2.  Updating Modification Times with touch
        Section 10.3.  Creating and Using Temporary Files
        Section 10.4.  Finding Files
        Section 10.5.  Running Commands: xargs
        Section 10.6.  Filesystem Space Information
        Section 10.7.  Comparing Files
        Section 10.8.  Summary
       Chapter 11.  Extended Example: Merging User Databases
        Section 11.1.  The Problem
        Section 11.2.  The Password Files
        Section 11.3.  Merging Password Files
        Section 11.4.  Changing File Ownership
        Section 11.5.  Other Real-World Issues
        Section 11.6.  Summary
       Chapter 12.  Spellchecking
        Section 12.1.  The spell Program
        Section 12.2.  The Original Unix Spellchecking Prototype
        Section 12.3.  Improving ispell and aspell
        Section 12.4.  A Spellchecker in awk
        Section 12.5.  Summary
       Chapter 13.  Processes
        Section 13.1.  Process Creation
        Section 13.2.  Process Listing
        Section 13.3.  Process Control and Deletion
        Section 13.4.  Process System-Call Tracing
        Section 13.5.  Process Accounting
        Section 13.6.  Delayed Scheduling of Processes
        Section 13.7.  The /proc Filesystem
        Section 13.8.  Summary
       Chapter 14.  Shell Portability Issues and Extensions
        Section 14.1.  Gotchas
        Section 14.2.  The bash shopt Command
        Section 14.3.  Common Extensions
        Section 14.4.  Download Information
        Section 14.5.  Other Extended Bourne-Style Shells
        Section 14.6.  Shell Versions
        Section 14.7.  Shell Initialization and Termination
        Section 14.8.  Summary
       Chapter 15.  Secure Shell Scripts: Getting Started
        Section 15.1.  Tips for Secure Shell Scripts
        Section 15.2.  Restricted Shell
        Section 15.3.  Trojan Horses
        Section 15.4.  Setuid Shell Scripts: A Bad Idea
        Section 15.5.  ksh93 and Privileged Mode
        Section 15.6.  Summary
       Appendix A.  Writing Manual Pages
        Section A.1.  Manual Pages for pathfind
        Section A.2.  Manual-Page Syntax Checking
        Section A.3.  Manual-Page Format Conversion
        Section A.4.  Manual-Page Installation
       Appendix B.  Files and Filesystems
        Section B.1.  What Is a File?
        Section B.2.  How Are Files Named?
        Section B.3.  What's in a Unix File?
        Section B.4.  The Unix Hierarchical Filesystem
        Section B.5.  How Big Can Unix Files Be?
        Section B.6.  Unix File Attributes
        Section B.7.  Unix File Ownership and Privacy Issues
        Section B.8.  Unix File Extension Conventions
        Section B.9.  Summary
       Appendix C.  Important Unix Commands
        Section C.1.  Shells and Built-in Commands
        Section C.2.  Text Manipulation
        Section C.3.  Files
        Section C.4.  Processes
        Section C.5.  Miscellaneous Programs
       Chapter 16.  Bibliography
        Section 16.1.  Unix Programmer's Manuals
        Section 16.2.  Programming with the Unix Mindset
        Section 16.3.  Awk and Shell
        Section 16.4.  Standards
        Section 16.5.  Security and Cryptography
        Section 16.6.  Unix Internals
        Section 16.7.  O'Reilly Books
        Section 16.8.  Miscellaneous Books
     Colophon
     Index

The user or programmer new to Unix is suddenly faced with a bewildering variety of programs, each of which often has multiple options. Questions such as "What purpose do they serve?" and "How do I use them?" spring to mind.
This book's job is to answer those questions. It teaches you how to combine the Unix tools, together with the standard shell, to get your job done. This is the art of shell scripting. Shell scripting requires not just a knowledge of the shell language, but also a knowledge of the individual Unix programs: why each one is there, and how to use them by themselves and in combination with the other programs.
Why should you learn shell scripting? Because often, medium-size to large problems can be decomposed into smaller pieces, each of which is amenable to being solved with one of the Unix tools. A shell script, when done well, can often solve a problem in a mere fraction of the time it would take to solve the same problem using a conventional programming language such as C or C++. It is also possible to make shell scripts portable—i.e., usable across a range of Unix and POSIX-compliant systems, with little or no modification.
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