Table of contents

1. Introduction to Operating Systems

• What is an Operating System?
• What does an Operating System do?
• Components of an Operating System
• Graphical User Interfaces vs Command Line Interfaces
• A Brief History of Operating Systems
• Anatomy of a Command Line Interface (CLI)

2. Filesystem Basics

• Hierarchical File Systems
• Filenames
• Current Working Directory
• Pathnames
• Volume Designators
• Basic Commands for Dealing with Files and Directories

3. Filename Patterns, Common Commands, and Text Editors

• Filename Patterns
• Common Commands
• Viewing Online Documentation
• Text Editors

4. Permissions

• Discretionary vs. Mandatory Access Controls
• Linux File Permissions
• Access Control Lists

5. Redirection

• Standard File Descriptors/Handles
• File Redirection
• Piping

6. Resources and Processes

• Computer Resources
• Monitoring and Terminating Processes

7. Bash Scripting

• What is a Script?
• Basic Requirements for Shell Scripts
• Comments
• Variables
• Environment Variables
• Reading Values from Stdin: read
• Command Capture
• Arithmetic
• Exit Status Codes
• Conditional Logic: if / then / elif / else / fi
• The test Command
• Parameters
• Example Scripts
• Looping in Bash

8. Windows CMD Scripting

• Windows vs. Linux Scripting
• Basic Requirements for Shell Scripts
• Command Echos
• Basic Script Example
• Variables
• Environment Variables
• Reading Values from Stdin: set /p
• Conditional Logic: if/else
• Script Paramterrs
• Looping

9. Regular Expressions

• What are Regular Expressions? Why use them?
• The Seven Basic Elements of Regular Expressions
• Regular Expression Examples
• Regular Expression Dialects
• Using Regular Expressions
• Windows FINDSTR and Regular Expressions