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BASH-PROG

Bash Programming Training

The Introduction to Bash Shell Scripting course teaches students to read, write, and debug Bash (Bourne Again Shell) scripts.
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Course Details

Duration

3 days

Prerequisites

All students should have basic knowledge of Unix or Linux, or have taken the Introduction to Linux for End Users class. Prior programming or scripting experience is helpful but not required.

Skills Gained

  • Understand Unix processes and how to control them
  • Learn how to use and script the Bash shell
  • Master core Bash language constructs such as variables, loops, conditionals, and functions
  • Learn advanced Bash programming techniques
  • Debug Bash scripts
Course Outline
  • Unix Processes
    • What is a Process?
    • Process Structure
    • The ps Utility
    • Options to the ps Utility
    • Background Commands (&)
    • Killing Background Processes
    • Redirecting the Standard Error
  • Getting Started
    • What is a Shell?
    • Running Scripts
    • Specifying the Script’s Interpreter
    • The PATH Environment Variable
    • Sub-shells
  • Variables
    • Shell Variables
    • The read Command
    • The export Command
    • The Shell Environment
    • Parameter Expansion
    • Command Substitution
  • The Login Process
    • The Login Process
    • The System Profile Script
    • Your .bash_profile Script
    • The . Command
  • Conditional Statements
    • The Exit Status of Commands
    • Command Line Examples
    • The test Command
    • The if-then-else Construct
    • The elif Construct
    • case Statements
  • Loops
    • The for Loop
    • The while Loop
    • break and continue
    • Reading Lines From Files
    • Using Arrays with Loops
  • Special Variables
    • $$ - PID of Shell
    • Command-Line Arguments
    • $# - Number of Arguments
    • $* - All Arguments
    • The shift Command
    • The set Command
    • Getting Options
  • Quoting Mechanisms
    • Single vs. Double Quotes
    • What is a Here Document?
    • Using a Here Document
    • Here Document Quoting
    • Ignoring Leading Tabs
  • Functions
    • Shell Functions
    • Passing Arguments to Functions
    • Returning Values from Functions
    • Function Declarations
  • Advanced Programming
    • Shell Arithmetic
    • The select Statement
    • Terminal Independence in Scripts
    • The eval Command
  • Debugging Techniques
    • Using echo
    • Bash Programming
    • Using Standard Error
    • Script Tracing
    • Options for Debugging
    • Conditional Debugging
  • Conclusion