Introduction to Bash Scripting
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Introduction to Bash Scripting

About the Book

About the Author

Shyam Gupta
Shyam Gupta

I've more than two decades of experience in the IT industry, managing service delivery for financial services sector clients.

Table of Contents

  • Chapter 1: Hello World!
    • Executing the script
    • umask
    • Adding file to $PATH
    • Positional Parameters
  • Chapter 2: Variables
    • Quotations
    • Setting Variables
    • Specifying Default Values
    • Reading Variables
    • Built-in Variables
    • Environment Variables
    • declare Command
  • Chapter 3: Prompting for input
  • Chapter 4: Heredoc
  • Chapter 5: Comparing Values
    • Comparing Numerical Values
    • Comparing Strings
    • Extended Test
  • Chapter 6: Working with numbers
  • Chapter 7: Functions
    • Declaring Functions
    • Function Parameters
    • Return Values
  • Chapter 8: Loops
    • for Loop
    • while Loop
  • Chapter 9: Conditional Logic
    • if - else Statement
    • Avoiding if-else Statements
  • Chapter 10: Expansions and Substitutions
    • Tilde Expansion
    • Brace Expansion
    • Parameter Expansion
    • Pattern Substitution
    • Command Substitution
  • Chapter 11: Formatting output with printf
    • Width Modifiers
    • Pricision Modifiers
  • Chapter 12: Arrays
    • Defining Arrays
    • Retrieving Values
    • Setting Values
    • Appending to an array
    • Length of an array
    • Looping through an array
    • Associative Arrays
  • Chapter 13: Case Statement
    • Syntax
    • Example
  • Chapter 14: Extracting Substrings
    • Using Bash Substring Expansion
    • Using IFS
    • Using cut
  • Chapter 15: Debugging Scripts

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