Bash Guide for Beginners
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Chapter 7. Conditional statements

Table of Contents

7.1. Introduction to if

7.1.1. General
7.1.2. Simple applications of if

7.2. More advanced if usage

7.2.1. if/then/else constructs
7.2.2. if/then/elif/else constructs
7.2.3. Nested if statements
7.2.4. Boolean operations
7.2.5. Using the exit statement and if

7.3. Using case statements

7.3.1. Simplified conditions
7.3.2. Initscript example

7.4. Summary

7.5. Exercises

In this chapter we will discuss the use of conditionals in Bash scripts. This includes the following topics:

The if statement
Using the exit status of a command
Comparing and testing input and files
if/then/else constructs
if/then/elif/else constructs
Using and testing the positional parameters
Nested if statements
Boolean expressions
Using case statements

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Exercises		Introduction to if