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Clear-Item - Powershell 1.0 CmdLet

Microsoft Windows PowerShell is a command-line shell and scripting tool based on the Microsoft .NET Framework. It is designed for system administrators, engineers and developers to control and automate the administration of Windows and applications.

More than hundred command-line tools (so called "cmdlets") can be used to perform system administration tasks and Windows Management Instrumentation (WMI). These cmdlets are easy to use, with standard naming conventions and common parameters, and standard tools for piping, sorting, filtering, and formatting data and objects.


Remove content from a variable or an alias


-path string
       The paths to the items from which content is deleted.
       Wildcards are permitted.

    -literalPath string
       Like Path above, only the value is used exactly as typed.
       No characters are interpreted as wildcards. If the path includes any
       escape characters then enclose the path in single quotation marks.
   -include string
       Clear only the specified items from the Path. e.g. "May*"
   -exclude string
       Omits the specified items from the Path e.g. "*SS64*"
   -filter string
       A filter in the provider's format or language. 
       The exact syntax of the filter (wildcard support etc) depends on the provider.
       Filters are more efficient than -include/-exclude, because the provider
       applies the filter when retrieving the objects, rather than having 
       PowerShell filter the objects after they are retrieved.
       Override restrictions that prevent the command from succeeding, apart
       from security settings. e.g. Force will create file path directories 
       or override a files read-only attribute, but will not change file permissions.
   -credential PSCredential
       Uses a credential to validate access to the file. Credential represents
       a user-name, such as "User01" or "Domain01\User01", or a PSCredential
       object, such as the one retrieved using Get-Credential.
       This parameter appears, but it is not yet supported in any PowerShell core 
       cmdlets or providers.
       Describe what would happen if you executed the command without actually
       executing the command.
       Prompt for confirmation before executing the command.
        -Verbose, -Debug,-ErrorAction,-ErrorVariable, -OutVariable.

Delete the content of a MyTestVariable:

   PS C:>clear-item Variable:MyTestVariable
   PS C:> Set-location Variable:
   PS Variable:\> clear-item MyTestVariable

Remove the aliases: ss64demo1, ss64demo2:

   PS C:>clear-item Alias:ss64* -include *demo*

Remove all the registry entries under : hklm\Software\SS64\DemoKey:

   PS C:>clear-item registry::HKLM\Software\SS64\DemoKey