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
Variable Substitution
Command Substitution

The Login Process
The Login Process
The System Profile Script
Your .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
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
Using Standard Error
Options for Debugging
Script Tracing