Module Outline

• Introduction
• Write Simple Bash Scripts
• Loops and Conditional Constructs in Scripts
• Match Text in Command Output with Regular Expressions
• Guided Exercise
• Graded Lab
• Summary
• Resources
• Graded Lab

Learning Objectives

After completing the work in this module you will be able to:

• Use the features of the Bash shell to run commands more efficiently.
• Use a for loop to run repeatative commands.
• Evaluate exit codes.
• Create conditional structures with if statements.
• Create regular expressions to match data.
• Use the grep command to apply regular expressions to text files.

Introduction

Improve Command-line Productivity

Write Simple Bash Scripts

Execute a Bash Shell Script

Guided Exercise

Write Simple Bash Scripts

Loops and Conditional Constructs in Scripts

Create and Execute Bash Shell Scripts

Specify the Command Interpreter

Execute a Bash Shell Script

Quote Special Characters

Provide Output from a Shell Script

Guided Exercise

Write Simple Bash Scripts

Use Loops to Iterate Commands

Bash Script Exit Codes

Test Logic for Strings and Directories, and to Compare Values

Conditional Structures

Loops and Conditional Constructs in Scripts

Use Loops to Iterate Commands

Process Items from the Command Line

Process Items from the Command Line

Conditional Structures

Use the If/Then Construct

Use the If/Then Construct

Use the If/Then/Elif/Then/Else Construct

Guided Exercise

Loops and Conditional Constructs in Scripts

Write Regular Expressions

Describe a Simple Regular Expression

Match the Start and End of a Line

Guided Exercise

Match Text in Command Output with Regular Expressions

Guided Exercise

Loops and Conditional Constructs in Scripts

Match Text in Command Output with Regular Expressions

Write Regular Expressions

Describe a Simple Regular Expression

Match the Start and End of a Line

Basic and Extended Regular Expression

Wildcard and Multiplier Usage in Regular Expressions

Match Regular Expressions from the Command Line

Isolating Data with the grep Command

The grep Command Options

Examples of the grep Command

Guided Exercise

Match Text in Command Output with Regular Expressions

Module Summary

Improve Command-line Productivity

Resources

Improve Command-line Productivity

• Ryan's Tutorials
• Shell Scripting Tutorial

Graded Lab

Improve Command-line Productivity

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