Book Image

Mastering Windows PowerShell Scripting (Second Edition) - Second Edition

By : Brenton J.W. Blawat
Book Image

Mastering Windows PowerShell Scripting (Second Edition) - Second Edition

By: Brenton J.W. Blawat

Overview of this book

PowerShell scripts offer a handy way to automate various chores. Working with these scripts effectively can be a difficult task. This comprehensive guide starts from scratch and covers advanced-level topics to make you a PowerShell expert. The first module, PowerShell Fundamentals, begins with new features, installing PowerShell on Linux, working with parameters and objects, and also how you can work with .NET classes from within PowerShell. In the next module, you’ll see how to efficiently manage large amounts of data and interact with other services using PowerShell. You’ll be able to make the most of PowerShell’s powerful automation feature, where you will have different methods to parse and manipulate data, regular expressions, and WMI. After automation, you will enter the Extending PowerShell module, which covers topics such as asynchronous processing and, creating modules. The final step is to secure your PowerShell, so you will land in the last module, Securing and Debugging PowerShell, which covers PowerShell execution policies, error handling techniques, and testing. By the end of the book, you will be an expert in using the PowerShell language.
Table of Contents (24 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

The WMI cmdlets


Note

The WMI cmdlets have been superseded by the CIM cmdlets.

The WMI commands are:

  • Get-WmiObject
  • Invoke-WmiMethod
  • Register-WmiEvent
  • Remove-WmiObject
  • Set-WmiInstance

In addition to the commands, three type accelerators are available:

  • [Wmi]: System.Management.ManagementObject
  • [WmiClass]: System.Management.ManagementClass
  • [WmiSearcher]: System.Management.ManagementObjectSearcher

Each of the WMI cmdlets uses the ComputerName parameter to aim the operation at another computer. The WMI cmdlets also support a credential parameter and other authentication options affecting the authentication method.

Both the Wmi and WmiClass type accelerator can be written to use a remote computer by including the computer name. For example:

[Wmi]"\\RemoteComputer\root\cimv2:Win32_Process.Handle=$PID" 
[WmiClass]"\\RemoteComputer\root\cimv2:Win32_Process" 

Getting instances

The Get-WmiObject command is used to execute queries for instances of WMI objects. For example:

Get-WmiObject -Class Win32_ComputerSystem 

The...