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| List of Tables | |
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| List of Figures | |
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| Preface | |
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| That No One Will Ever Read | |
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| Author's Note Regarding the ksh93 Edition | |
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| Before Writing Your First KornShell Scripts | |
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| Getting Started | |
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| What Shell Is Executing My Script? | |
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| Operating System Commands in a Shell Script | |
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| Beware: Are You Allowed to Execute This Script? | |
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| Commenting Your Code | |
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| Beware: Picking a Bad Name for Your Script | |
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| The Usage Line | |
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| Simple Output | |
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| Variables | |
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| Beware: Variable Names Are Case Sensitive | |
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| Simple Input | |
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| Obtaining the Value of a Variable | |
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| Beware: The Dollar Sign in Read Statements | |
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| Newlines, Semicolons, White Space, and Columns | |
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| Beware: Confusing + and - | |
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| Assigning a Value to a Variable | |
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| Beware: Common Mistakes When Assigning Variables | |
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| Finding Your Mistakes | |
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| Can I Quote You on That? | |
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| Data Types | |
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| If You're New to Programming | |
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| If You're an Experienced Programmer | |
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| Declaring Strings | |
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| Declaring Integers | |
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| Binary, Octal, Hex, and So On | |
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| Declaring Floats | |
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| Declaring Constants | |
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| Declaring nameref Variables | |
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| Declaring Arrays | |
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| Declaring Arrays with set -A | |
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| Printing Array Values | |
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| Beware: Common Array Mistakes | |
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| Declaring Associative Arrays | |
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| Probing Arrays | |
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| Declaring Structures Part I | |
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| Declaring Structures Part II | |
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| Arrays of Structures | |
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| Math | |
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| If You're New to Programming | |
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| If You're an Experienced Programmer | |
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| Double Parentheses | |
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| Integer Addition, Subtraction, and Multiplication | |
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| Integer Division | |
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| Floating-Point Math | |
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| Mixing Floating-Point and Integer Math | |
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| Grouping Mathematical Operations | |
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| Beware: Common Mistakes in Math Operations | |
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| Mathematical Assignment Operators | |
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| The Triggy Stuff | |
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| Beware: Math Functions Inside Double Parentheses | |
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| A Practical Math Example | |
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| Math Operator Summary | |
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| Pattern Matching. If You're New to Programming | |
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| If You're an Experienced Programmer | |
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| For Everyone | |
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| The ? Wildcard | |
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| The [char1char2...charN] Wildcard | |
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| Character Classes | |
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| The * Wildcard | |
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| Beware: Matching Filenames | |
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| The ?(pattern1 | |
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| Beware: White Space within Patterns | |
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| The @(pattern1 | |
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| The !(pattern1 | |
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| The +(pattern1 | |
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| The !(subpattern1 | |
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| Matching Subpatterns with \d | |
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| Simple Commands Containing Patterns | |
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| Wildcard Summary | |
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| Conditions | |
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| If You're New to Programming | |
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| If You're an Experienced Programmer | |
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| Tests on Numbers and Strings | |
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| Comparing Numbers with if | |
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| Beware: Common Mistakes Using if with Numbers | |
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| Comparing Numbers with the ? : Operator | |
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| Beware: Common Mistakes in ? : Compound Statements. else and elif | |
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| Comparing Strings with if | |
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| Comparing Alphabetical Order with < and > | |
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| Comparing a String to a Pattern with if | |
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| Beware: Common Mistakes Comparing | |