Windows PowerShell Cookbook

Windows PowerShell Cookbook

Lee Holmes O'REILLY'

Beijing ? Cambridge ? Farnham ? Koln ? Paris ? Sebastopol ? Taipei ? Tokyo

Table of Contents

Foreword Preface

Part I. Tour

A Guided Tour of Windows PowerShell

Introduction

An Interactive Shell

Structured Commands (Cmdlets)

Deep Integration of Objects "

Administrators As First-Class Users

Composable Commands

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Techniques to Protect You from Yourself

Common Discovery Commands '

Ubiquitous Scripting

Ad Hoc Development

Bridging Technologies

Namespace Navigation Through Providers

Much, Much More

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Part II. Fundamentals

1. The Windows PowerShell Interactive Shell

1.0 Introduction 1.1 Run Programs, Scripts, and Existing Tools 1.2 Run a PowerShell Command

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1.3 Customize Your Shell, Profile, and Prompt

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1.4 Find a Command to Accomplish a Task

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1.5 Get Help on a Command

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1.6 Program: Search Help for Text

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1.7 Invoke a PowerShell Script From Outside PowerShell

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1.8 Program: Retain Changes to Environment Variables Set by a Batch File30

1.9 Get the System Date and Time

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1.10 Determine the Status of the Last Command

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1.11 Measure the Duration of a Command

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1.12 Customize the Shell to Improve Your Productivity

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1.13 Program: Learn Aliases for Common Commands

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1.14 Access and Manage Your Console History

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1.15 Store the Output of a Command into a File

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1.16 Add Information to the End of a File

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1.17 Record a Transcript of Your Shell Session

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1.18 Display the Properties of an Item As a List

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1.19 Display the Properties of an Item As a Table

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1.20 Manage the Error Output of Commands

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1.21 Configure Debug, Verbose, and Progress Output

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1.22 Extend Your Shell with Additional Snapins

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1.23 Use Console Files to Load and Save Sets of Snapins

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2. Pipelines

*.

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2.0 Introduction

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2.1 Filter Items in a List or Command Output

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2.2 Program: Simplify Most Where-Object Filters

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2.3 Program: Interactively Filter Lists of Objects

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2.4 Work with Each Item in a List or Command Output

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2.5 Automate Data-Intensive Tasks

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3. Variables and Objects

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3.0 Introduction

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3.1 Store Information in Variables

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3.2 Access Environment Variables

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3.3 Control Access and Scope of Variables and Other Items

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3.4 Work with .NET Objects

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3.5 Create an Instance of a .NET Object

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3.6 Program: Create Instances of Generic Objects

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3.7 Reduce Typing for Long Class Names

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Table of Contents

3.8 Use a COM Object 3.9 Learn About Types and Objects 3.10 Get Detailed Documentation About Types and Objects 3.11 Add Custom Methods and Properties to Objects 3.12 Add Custom Methods and Properties to Types

4. Looping and Flow Control

4.0 Introduction 4.1 Make Decisions with Comparison and Logical Operators 4.2 Adjust Script Flow Using Conditional Statements 4.3 Manage Large Conditional Statements with Switches 4.4 Repeat Operations with Loops 4.5 Add a Pause or Delay

5. Strings and Unstructured Text..

5.0 Introduction

5.1 Create a String

5.2 Create a Multiline or Formatted String

5.3 Place Special Characters in a String

5.4 Insert Dynamic Information in a String '

5.5 Prevent a String from Including Dynamic Information

5.6 Place Formatted Information in a String

5.7 Search a6tring for Text or a Pattern

5.8 Replace Text in a String

5.9 Convert a String to Upper/Lowercase

5.10 Trim a String '

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5.11 Format a Date for Output^ '

5.12 Program: Convert Text Streams to Objects

5.13 Generate Large Reports'and Text Streams

6. Calculations and Math

6.0 Introduction

6.1 Perform Simple Arithmetic

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6.2 Perform Complex Arithmetic

6.3 Measure Statistical Properties of a List

6.4 Work with Numbers As Binary

6.5 Simplify Math with Administrative Constants

6.6 Convert Numbers Between Bases

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Table of Contents I vii

Part III. Common Tasks

7. Simple Files

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7.0 Introduction

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7.1 Get the Content of a File

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7.2 Search a File for Text or a Pattern

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7.3 Parse and Manage Text-Based Logfiles

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7.4 Parse and Manage Binary Files

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7.5 Create a Temporary File

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7.6 Search and Replace Text in a File

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8. Structured Files

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8.0 Introduction

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8.1 Access Information in an XML File

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8.2 Perform an XPath Query Against an XML File

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8.3 Modify Data in an XML File

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8.4 Easily Import and Export Your Structured Data

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8.5 Store the Output of a Command in a CSV File

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8.6 Import Structured Data from a CSV File

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8.7 Use Excel to Manage Command Output

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9. Internet-Enabled Scrjpts

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9.0 Introduction

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9.1 Download a File from the Internet

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9.2 Download a Web Pa'ge from the Internet

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9.3 Program: Get-PageUrls

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9.4 Program: Connect-WebService .

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9.5 Export Command Output As^a Web Page

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9.6 Program: Send an Email

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9.7 Program: Interact with Internet Protocols

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10. Code Reuse

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10.0 Introduction

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10.1 Write a Script

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10.2 Write a Function

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10.3 Write a Script Block

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10.4 Return Data from a Script, Function, or Script Block

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10.5 Place Common Functions in a Library

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10.6 Access Arguments of a Script, Function, or Script Block

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viii I Table of Contents

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