about_PSSnapins - PowerShell command help and examples

Describes Windows PowerShell snap-ins and shows how to use and manage them. (about_PSSnapins)

TOPIC
about_PSSnapins
SHORT DESCRIPTION
Describes Windows PowerShell snap-ins and shows how to use and manage them.
LONG DESCRIPTION
A Windows PowerShell snap-in is a Microsoft .NET Framework assembly that contains Windows PowerShell providers and/or cmdlets. Windows PowerShell includes a set of basic snap-ins, but you can extend the power and value of Windows PowerShell by adding snap-ins that contain providers and cmdlets that you create or get from others. When you add a snap-in, the cmdlets and providers that it contains are immediately available for use in the current session, but the change affects only the current session. To add the snap-in to all future sessions, save it in your Windows PowerShell profile. You can also use the Export-Console cmdlet to save the snap-in names to a console file and then use it in future sessions. You can even save multiple console files, each with a different set of snap-ins. BUILT-IN SNAP-INS Windows PowerShell includes a set of Windows PowerShell snap-ins that contain the built-in providers and cmdlets. Microsoft.PowerShell.Core Contains providers and cmdlets used to manage the basic features of Windows PowerShell. It includes the FileSystem, Registry, Alias, Environment, Function, and Variable providers and basic cmdlets like Get-Help, Get-Command, and Get-History. Microsoft.PowerShell.Host Contains cmdlets used by the Windows PowerShell host, such as Start-Transcript and Stop-Transcript. Microsoft.PowerShell.Management Contains cmdlets such as Get-Service and Get-ChildItem that are used to manage Windows-based features. Microsoft.PowerShell.Security Contains cmdlets used to manage Windows PowerShell security, such as Get-Acl, Get-AuthenticodeSignature, and ConvertTo-SecureString. Microsoft.PowerShell.Utility Contains cmdlets used to manipulate objects and data, such as Get-Member, Write-Host, and Format-List. FINDING SNAP-INS To get a list of the Windows PowerShell snap-ins on your computer, type: get-pssnapin To get the snap-in for each Windows PowerShell provider, type: get-psprovider | format-list name, pssnapin To get a list of the cmdlets in a Windows PowerShell snap-in, type: get-command -module <snap-in_name> INSTALLING A SNAP-IN The built-in snap-ins are registered in the system and added to the default session when you start Windows PowerShell. However, you have to register snap-ins that you create or obtain from others and then add the snap-ins to your session. REGISTERING A SNAP-IN A Windows PowerShell snap-in is a program written in a .NET Framework language that is compiled into a .dll file. To use the providers and cmdlets in a snap-in, you must first register the snap-in (add it to the registry). Most snap-ins include an installation program (an .exe or .msi file) that registers the .dll file for you. However, if you receive a snap-in as a .dll file, you can register it on your system. For more information, see "How to Register Cmdlets, Providers, and Host Applications" in the MSDN (Microsoft Developer Network) library at http://go.microsoft.com/fwlink/?LinkID=143619. To get all the registered snap-ins on your system or to verify that a snap-in is registered, type: get-pssnapin -registered ADDING THE SNAP-IN TO THE CURRENT SESSION To add a registered snap-in to the current session, use the Add-PsSnapin cmdlet. For example, to add the Microsoft SQL Server snap-in to the session, type: add-pssnapin sql After the command is completed, the providers and cmdlets in the snap-in are available in the session. However, they are available only in the current session unless you save them. SAVING THE SNAP-INS To use a snap-in in future Windows PowerShell sessions, add the Add-PsSnapin command to your Windows PowerShell profile. Or, export the snap-in names to a console file. If you add the Add-PSSnapin command to your profile, it is available in all future Windows PowerShell sessions. If you export the names of the snap-ins in your session, you can use the export file only when you need the snap-ins. To add the Add-PsSnapin command to your Windows PowerShell profile, open your profile, paste or type the command, and then save the profile. For more information, see about_Profiles. To save the snap-ins from a session in console file (.psc1), use the Export-Console cmdlet. For example, to save the snap-ins in the current session configuration to the NewConsole.psc1 file in the current directory, type: export-console NewConsole For more information, see Export-Console. OPENING WINDOWS POWERSHELL WITH A CONSOLE FILE To use a console file that includes the snap-in, start Windows PowerShell (Powershell.exe) from the command prompt in Cmd.exe or in another Windows PowerShell session. Use the PsConsoleFile parameter to specify the console file that includes the snap-in. For example, the following command starts Windows PowerShell with the NewConsole.psc1 console file: powershell.exe -psconsolefile NewConsole.psc1 The providers and cmdlets in the snapin are now available for use in the session. REMOVING A SNAP-IN To remove a Windows PowerShell snap-in from the current session, use the Remove-PsSnapin cmdlet. For example, to remove the SQL Server snap-in from the current session, type: remove-pssnapin sql This cmdlet removes the snap-in from the session. The snap-in is still loaded, but the providers and cmdlets that it supports are no longer available. SEE ALSO Add-PsSnapin Get-PsSnapin Remove-PsSnapin Export-Console Get-Command about_Profiles C:\Windows>powershell get-help about_Quoting_Rules -full

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