Command Line Fundamentals : Learn to Use the Unix Command-line Tools and Bash Shell Scripting

Master shell basics and Unix tools and discover easy commands to perform complex tasks with speed Key Features Learn why the Bash shell is widely used on Linux and iOS Explore advanced shell concepts, such as pipes and redirection Understand how to use Unix command-line tools as building blocks for different tasks Book Description The most basic interface to a computer―the command line―remains the most flexible and powerful way of processing data and performing and automating various day-to-day tasks. Command Line Fundamentals begins by exploring the basics, and then focuses on the most common tool, the Bash shell (which is standard on all Linux and iOS systems). As you make your way through the book, you'll explore the traditional Unix command-line programs as implemented by the GNU project. You'll also learn to use redirection and pipelines to assemble these programs to solve complex problems. By the end of this book, you'll have explored the basics of shell scripting, allowing you to easily and quickly automate tasks. What you will learn Use the Bash shell to run commands Utilize basic Unix utilities such as cat, tr, sort, and uniq Explore shell wildcards to manage groups of files Apply useful keyboard shortcuts in shell Employ redirection and pipes to process data Write both basic and advanced shell scripts to automate tasks Who this book is for Command Line Fundamentals is for programmers who use GUIs but want to understand how to use the command line to complete tasks faster. Table of Contents Introduction to the Command Line Command Line Building Blocks Advanced Command Line Concepts Shell Scripting Preface Introduction to the Command Line Introduction Command Line: History, Shells, and Terminology History of the Command Line Command-Line Shells Command-Line Terminology Exploring the Filesystem Filesystems Navigating Filesystems Exercise 1: Exploring Filesystem Contents Manipulating a Filesystem Exercise 2: Manipulating the Filesystem Activity 1: Navigating the Filesystem and Viewing Files Activity 2: Modifying the Filesystem Shell History Recall, Editing, and Autocompletion Command History Recall Exercise 3: Exploring Shell History Command-Line Shortcuts Exercise 4: Using Shell Keyboard Shortcuts Command-Line Autocompletion Exercise 5: Completing a Folder Path Exercise 6: Completing a Command Exercise 7: Completing a Command using Options Activity 3: Command-Line Editing Shell Wildcards and Globbing Wildcard Syntax and Semantics Wildcard Expansion or Globbing Exercise 8: Using Wildcards Activity 4: Using Simple Wildcards Activity 5: Using Directory Wildcards Summary Command-Line Building Blocks Introduction Redirection Input and Output Streams Use of Operators for Redirection Using Multiple Redirections Heredocs and Herestrings Buffering Exercise 9: Working with Command Redirection Pipes Exercise 10: Working with Pipes Text-Processing Commands Shell Input Concepts Filtering Commands Exercise 11: Working with Filtering Commands Transformation Commands Exercise 12: Working with Transformation Commands Activity 6: Processing Tabular Data – Reordering Columns Activity 7: Data Analysis Summary Advanced Command-Line Concepts Introduction Command Lists Command List Operators Using Multiple Operators Command Grouping Exercise 13: Using Command Lists Job Control Keyboard Shortcuts for Controlling Jobs Commands for Controlling Jobs Regular Expressions Elements Quantifiers Anchoring Subexpressions and Backreferences Exercise 14: Using Regular Expressions Activity 8: Word Matching with Regular Expressions Shell Expansion Environment Variables and Variable Expansion Arithmetic Expansion Brace Expansion Recursive Expansion with eval Command Substitution Process Substitution Exercise 15: Using Shell Expansions Activity 9: String Processing with eval and Shell Expansion Summary Shell Scripting Introduction Conditionals and Loops Conditional Expressions Conditional Statements Loops Loop Control Shell Functions Function Definition Function Arguments Return Values Local Variables, Scope, and Recursion Exercise 16: Using Conditional Statements, Loops, and Functions Shell Line Input Line Input Commands Internal Field Separator Exercise 17: Using Shell Input Interactively Shell Scripts Shell Command Categories Program Launch Process Script Interpreters Practical Case Study 1: Chess Game Extractor Understanding the Problem Exercise 18: Chess Game Extractor – Parsing a PGN File Exercise 19: Chess Game Extractor – Extracting a Desired Game Refining Our Script Exercise 20: Chess Game Extractor – Handling Options Adding Features Exercise 21: Chess Game Extractor – Counting Game Moves Tips and Tricks Suppressing Command Output Arithmetic Expansion Declaring Typed Variables Numeric for Loops echo Array Reverse Indexing shopt Extended Wildcards man and info Pages shellcheck Activity 10: PGN Game Extractor Enhancement Practical Case Study 2: NYC Yellow Taxi Trip Analysis Understanding the Dataset Exercise 22: Taxi Trip Analysis – Extracting Trip Time Exercise 23: Taxi Trip Analysis – Calculating Average Trip Speed Exercise 24: Taxi Trip Analysis – Calculating Average Fare Activity 11: Shell Scripting – NYC Taxi Trip Analysis Summary Appendix Index _GoBack _Hlk523751376 _Hlk524548687 _GoBack _GoBack _Hlk525844716 _Hlk526802910 _Hlk525264096 _Hlk526376049 _Hlk527331650 _GoBack _Hlk528531641 _Hlk531297997 _GoBack _GoBack _Hlk531294793 Master shell basics and Unix tools and discover easy commands to perform complex tasks with speed Key Features Learn why the Bash shell is widely used on Linux and iOS Explore advanced shell concepts, such as pipes and redirection Understand how to use Unix command-line tools as building blocks for different tasks Book Description The most basic interface to a computer - the command line - remains the most flexible and powerful way of processing data and performing and automating various day-to-day tasks. Command Line Fundamentals begins by exploring the basics, and then focuses on the most common tool, the Bash shell (which is standard on all Linux and iOS systems). As you make your way through the book, you'll explore the traditional Unix command-line programs as implemented by the GNU project. You'll also learn to use redirection and pipelines to assemble these programs to solve complex problems. By the end of this book, you'll have explored the basics of shell scripting, allowing you to easily and quickly automate tasks. What you will learn Use the Bash shell to run commands Utilize basic Unix utilities such as cat, tr, sort, and uniq Explore shell wildcards to manage groups of files Apply useful keyboard shortcuts in shell Employ redirection and pipes to process data Write both basic and advanced shell scripts to automate tasks Who this book is for Command Line Fundamentals is for programmers who use GUIs but want to understand how to use the command line to complete tasks faster From the bash shell to the traditional UNIX programs, and from redirection and pipes to automating tasks, Command Line Fundamentals teaches you all you need to know about how command lines work.