Windows PowerShell 3.0 Step by Step - Cdn.oreilly.com - O'Reilly

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Once the UpdateHelpTrackErrors script runs, a progress bar displays indicating the progress as the updatable help files update. Once the script completes, any errors appear in order. The script and associated errors appear in Figure 1-2. FIGURE 1-2 Cleaner error output from updatable help generated by the UpdateHelpTrackErrors script. You can also determine which modules receive updated help by running the Update-Help cmdlet with the -verbose parameter. Unfortunately, when you do this, the output scrolls by so fast that it is hard to see what has actually updated. To solve this problem, redirect the verbose output to a text file. In the command that follows, all modules attempt to update help. The verbose messages redirect to a text file named updatedhelp.txt in a folder named fso off the root. Update-Help -module * -force -verbose 4>>c:\fso\updatedhelp.txt Windows PowerShell has a high level of discoverability; that is, to learn how to use PowerShell, you can simply use PowerShell. Online help serves an important role in assisting in this discoverability. The help system in Windows PowerShell can be entered by several methods. To learn about using Windows PowerShell, use the Get-Help cmdlet as follows: Get-Help Get-Help This command prints out help about the Get-Help cmdlet. The output from this cmdlet is illustrated here: CHAPTER 1 Overview of Windows PowerShell 3.0 15
NAME Get-Help SYNOPSIS Displays information about Windows PowerShell commands and concepts. SYNTAX Get-Help [[-Name] ] [-Category ] [-Component ] [-Full []] [-Functionality ] [-Path ] [-Role ] [] Get-Help [[-Name] ] [-Category ] [-Component ] [-Functionality ] [-Path ] [-Role ] -Detailed [] [] Get-Help [[-Name] ] [-Category ] [-Component ] [-Functionality ] [-Path ] [-Role ] -Examples [] [] Get-Help [[-Name] ] [-Category ] [-Component ] [-Functionality ] [-Path ] [-Role ] -Online [] [] Get-Help [[-Name] ] [-Category ] [-Component ] [-Functionality ] [-Path ] [-Role ] -Parameter [] Get-Help [[-Name] ] [-Category ] [-Component ] [-Functionality ] [-Path ] [-Role ] -ShowWindow [] [] DESCRIPTION The Get-Help cmdlet displays information about Windows PowerShell concepts and commands, including cmdlets, providers, functions, aliases and scripts. Get-Help gets the help content that it displays from help files on your computer. Without the help files, Get-Help displays only basic information about commands. Some Windows PowerShell modules come with help files. However, beginning in Windows PowerShell 3.0, the modules that come with Windows PowerShell do not include help files. To download or update the help files for a module in Windows PowerShell 3.0, use the Update-Help cmdlet. You can also view the help topics for Windows PowerShell online in the TechNet Library at http: //go.microsoft.com/fwlink/?LinkID=107116 To get help for a Windows PowerShell command, type "Get-Help" followed by the command name. To get a list of all help topics on your system, type "Get-Help *". Conceptual help topics in Windows PowerShell begin with "about_", such as "about_Comparison_Operators". To see all "about_" topics, type "Get-Help about_*". To see a particular topic, type "Get-Help about_", such as "Get-Help about_Comparison_Operators". 16 Windows PowerShell 3 Step by Step
Page 2 and 3: Want to read more? Microsoft Press
Page 4 and 5: Contents Foreword .................
Page 6 and 7: Using the registry provider to mana
Page 8 and 9: Chapter 7 Creating Advanced Functio
Page 10 and 11: Chapter 11 Querying WMI 307 Alterna
Page 12 and 13: Finding disabled users ............
Page 14: Managing Exchange logging .........
Page 18 and 19: Introduction Windows PowerShell 3.0
Page 20 and 21: Conventions and features in this bo
Page 22: eviewer Thomas Lee whose attention
Page 25 and 26: Windows PowerShell Copyright (C) 20
Page 27 and 28: Get-PowerShellRequirements.ps1 Para
Page 29 and 30: tip Use multiple commands on a sing
Page 31 and 32: 4. Examine the output from the Get-
Page 33 and 34: 4. Use the Get-Process cmdlet to ob
Page 35 and 36: 2. Launch a specific version of Win
Page 37: FIGURE 1-1 Errors appear when attem
Page 41 and 42: Get-Help get-p* Suppose, however, t
Page 43 and 44: Using command-line utilities 1. Ope
Page 45 and 46: 8. Obtain a listing of all the help

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