Bash Shell Scripting Training Overview
Accelebrate's Introduction to Bash Shell Scripting course teaches students to read, write, and debug Bash (Bourne Again Shell) scripts.
NOTE: This class can be taught using the Linux distribution of your choice.
Location and Pricing
Accelebrate offers instructor-led enterprise training for groups of 3 or more online or at your site. Most Accelebrate classes can be flexibly scheduled for your group, including delivery in half-day segments across a week or set of weeks. To receive a customized proposal and price quote for private corporate training on-site or online, please contact us.
In addition, some courses are available as live, instructor-led training from one of our partners.
Objectives
- 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
Prerequisites
All students should have basic knowledge of Unix or Linux, or have taken Accelebrate's Introduction to Linux for End Users class. Prior programming or scripting experience is helpful but not required.
Outline
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Introduction
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
Training Materials
All attendees receive comprehensive courseware.
Software Requirements
Attendees will not need to install any software on their computers for this class. The class will be conducted in a remote environment that Accelebrate will provide; students will only need a local computer with a web browser and a stable Internet connection. Any recent version of Microsoft Edge, Mozilla Firefox, or Google Chrome will work well.
