Windows PowerShell Cookbook, 3rd Edition: The Complete Guide by Lee Holmes

By Lee Holmes

How do you employ home windows PowerShell to navigate the filesystem, deal with records and folders, or retrieve an internet web page? This creation to the PowerShell language and scripting setting presents greater than four hundred task-oriented recipes that can assist you resolve all types of difficulties. Intermediate to complex process directors will locate greater than a hundred tried-and-tested scripts they could reproduction and use instantly.

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Additional info for Windows PowerShell Cookbook, 3rd Edition: The Complete Guide to Scripting Microsoft's Command Shell

Example text

Let’s take a tour to see what it is capable of: • PowerShell works with standard Windows commands and applications. You don’t have to throw away what you already know and use. • PowerShell introduces a powerful new type of command. PowerShell commands (called cmdlets) share a common Verb-Noun syntax and offer many usability im‐ provements over standard commands. • PowerShell understands objects. Working directly with richly structured objects makes working with (and combining) PowerShell commands immensely easier than working in the plain-text world of traditional shells.

If you need the default value to dynamically change based on what parameter values are provided so far, you can use a script block as the default. When you do so, PowerShell evaluates the script block and uses its result as the default value. If your script block doesn’t return a result, PowerShell doesn’t apply a default value. When PowerShell invokes your script block, $args[0] contains information about any parameters bound so far: BoundDefaultParameters, BoundParameters, and BoundPo sitionalParameters.

In this example, you call the Get-History cmdlet to retrieve the history of your session. For each item, you get its CommandLine property (the thing you typed) and send the output to a new script file. info If this is the first time you’ve run a script in PowerShell, you will need to configure your execution policy. 1, “Enable Scripting Through an Execution Policy”. 21, “Pro‐ gram: Create Scripts from Your Session History”. NET Framework in your tasks, but its support for common technologies stretches even further.

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