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  • Book Overview & Buying PowerShell Troubleshooting Guide
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PowerShell Troubleshooting Guide

PowerShell Troubleshooting Guide

By : Michael Shepard
4.7 (3)
Buy this Book
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PowerShell Troubleshooting Guide

PowerShell Troubleshooting Guide

4.7 (3)
By: Michael Shepard
Buy this Book

Overview of this book

The techniques in this book apply to beginners who have just started to learn PowerShell, as well as advanced scripters who have a good grasp of the language.
Table of Contents (10 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. PowerShell Primer
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1. PowerShell Primer
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Introduction
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Cmdlets
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Functions
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Scripts
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Pipelines
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Variables
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Modules
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Further reading
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Summary
2
2. PowerShell Peculiarities
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2. PowerShell Peculiarities
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PowerShell strings
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Function output
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Pipeline processing
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PowerShell error handling
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Further reading
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Summary
3
3. PowerShell Practices
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3. PowerShell Practices
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Filter left
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Format right
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Comment-based help
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Using Write-* cmdlets
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Further reading
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Summary
4
4. PowerShell Professionalism
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4. PowerShell Professionalism
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Naming conventions
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Modularization
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Version control
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Unit testing
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Further reading
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Summary
5
5. Proactive PowerShell
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5. Proactive PowerShell
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Error handling
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CmdletBinding()
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SupportsShouldProcess
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Parameter value validation
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Pipeline input
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Pipelines and function execution
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Parameter type transformation
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#REQUIRES statements
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Set-StrictMode and Set-PSDebug -strict
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Further reading
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Summary
6
6. Preparing the Scripting Environment
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6. Preparing the Scripting Environment
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Validating operating system properties
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Validating service status
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Validating disk and memory availability
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Validating network connectivity
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Further reading
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Summary
7
7. Reactive Practices – Traditional Debugging
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7. Reactive Practices – Traditional Debugging
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Reading error messages
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Using Set-PSDebug
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Debugging in the console
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Debugging in the ISE
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Event logs
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The PSDiagnostics module
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Using –confirm and –whatif
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Reducing input set
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Using Tee-Object to see intermediate results
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Replacing the foreach loop with the foreach-object cmdlet
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Further reading
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Summary
8
8. PowerShell Code Smells
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8. PowerShell Code Smells
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Code smells
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Language-agnostic code smells
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PowerShell-specific code smells
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Missing Param() statements
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Homegrown common parameters
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Unapproved verbs
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Accumulating output objects
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Sequences of assignment statements
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Using untyped or [object] parameters
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Static analysis tools – ScriptCop and Script Analyzer
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Further reading
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Summary
9
Index
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Index

PowerShell strings

In PowerShell, either double quotes or single quotes can be used to express string literals. For instance, the following values are the same:

"HELLO WORLD"
'HELLO WORLD'

Using both kinds of quotes can be useful when quoting strings which themselves contain quotes, such as the following:

"I can't stop using PowerShell"
'He said, "I like using PowerShell" all day long'

If a single quote is needed in a single-quoted string, you can double the quote (for example, 'can't is a contraction'). The same technique allows the use of double-quotes in a double-quoted string. Strings written this way can be somewhat confusing to look at and it is easy to lose track of the number of quotes. A simpler method of including a double quote character in a string is to escape it with the backtick (`), also called a grave accent. The following string is an example: "the `" character is a double quote".

A peculiar...

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PowerShell Troubleshooting Guide
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