Tag Archives: UseTransaction

cmdlet, Transaction, Use

Use-Transaction

NAME
    Use-Transaction

SYNOPSIS
    Adds the script block to the active transaction.

SYNTAX
    Use-Transaction [-TransactedScript] <scriptblock> [-UseTransaction] [<CommonParameters>]

DESCRIPTION
    The Use-Transaction cmdlet adds a script block to an active transaction. This enables you to do transacted scripting using transaction-enabled Microsoft .NET Framework objects. The script block can contain only transaction-enabled .NET Framework objects, such as instances of the Microsoft.PowerShell.Commands.Management.TransactedString class.

    The UseTransaction parameter, which is optional for most cmdlets, is required when using this cmdlet.

    The Use-Transaction cmdlet is one of a set of cmdlets that support the transactions feature in Windows PowerShell. For more information, see about_transactions.

PARAMETERS
    -TransactedScript <scriptblock>
        Specifies the script block that is run in the transaction. Enter any valid script block enclosed in braces ( { } ). This parameter is required.

        Required?                    true
        Position?                    1
        Default value                None
        Accept pipeline input?     false
        Accept wildcard characters? false

    -UseTransaction [<SwitchParameter>]
        Includes the command in the active transaction. This parameter is valid only when a transaction is in progress. For more information, see about_transactions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer and OutVariable. For more information, type,
        “Get-Help about_CommonParameters“.

INPUTS
    None
        You cannot pipe input to this cmdlet.

OUTPUTS
    PSObject
        Use-Transaction returns the result of the transaction.

NOTES

        The Use-Transaction parameter includes the command in the active transaction. Because the Use-Transaction cmdlet is always used in transactions, this parameter is required to make any Use-Transaction command effective.

    ————————– EXAMPLE 1 ————————–

    C:\PS>Start-Transaction

    C:\PS> $transactedString = New-Object Microsoft.PowerShell.Commands.Management.TransactedString

    C:\PS> $transactedString.Append(“Hello”)
    C:\PS> Use-Transaction -TransactedScript { $transactedString.Append(“, World”) } -UseTransaction

    C:\PS> $transactedString.ToString()
    Hello

    C:\PS> Use-Transaction -TransactedScript { $transactedString.ToString() } -UseTransaction
    Hello, World

    C:\PS> Complete-Transaction
    C:\PS> $transactedString.ToString()
    Hello, World

    Description
    ———–
    This example shows how to use the Use-Transaction cmdlet to script against a transaction-enabled .NET Framework object. In this case, the object is a TransactedString object.

    The first command uses the Start-Transaction cmdlet to start a transaction.

    The second command uses the New-Object command to create a TransactedString object. It stores the object in the $TransactedString Variable.

    The third and fourth commands both use the Append method of the TransactedString object to add text to the value of $TransactedString. One command is part of the transaction; the other is not.

    The third command uses the Append method of the transacted string to add “Hello” to the value of $TransactedString. Because the command is not part of the transaction, the change is applied immediately.

    The fourth command uses the Use-Transaction cmdlet to add text to the string within the transaction. The command uses the Append method to add “, World” to the value of $TransactedString. The command is enclosed in braces ( {} ) to make it a script block. The UseTransaction parameter is required in this command.

    The fifth and sixth commands use the ToString method of the TransactedString object to display the value of the TransactedString as a string. Again, one command is part of the transaction; the other is not.

    The fifth command uses the ToString method to display the current value of the $TransactedString Variable. Because it is not part of the transaction, it displays only the current state of the string.

    The sixth command uses the Use-Transaction cmdlet to run the same command within the transaction. Because the command is part of the transaction, it displays the current value of the string within the transaction, much like a preview of the transaction changes.

    The seventh command uses the Complete-Transaction cmdlet to commit the transaction.

    The final command uses the ToString method to display the resulting value of the Variable as a string.

    ————————– EXAMPLE 2 ————————–

    C:\PS>Start-Transaction

    C:\PS> $transactedString = New-Object Microsoft.PowerShell.Commands.Management.TransactedString

    C:\PS> $transactedString.Append(“Hello”)
    C:\PS> Use-Transaction -TransactedScript { $transactedString.Append(“, World”) } -UseTransaction

    C:\PS> Undo-Transaction

    C:\PS> $transactedString.ToString()
    Hello

    Description
    ———–
    This example shows the effect of rolling back a transaction that includes Use-Transaction commands. Like all commands in a transaction, when the transaction is rolled back, the transacted changes are discarded and the data is unchanged.

    The first command uses the Start-Transaction cmdlet to start a transaction.

    The second command uses the New-Object command to create a TransactedString object. It stores the object in the $TransactedString Variable.

    The third command, which is not part of the transaction, uses the Append method to add “Hello” to the value of $TransactedString.

    The fourth command uses the Use-Transaction cmdlet to run another command that uses the Append method within the transaction. The command uses the Append method to add “, World” to the value of $TransactedString.

    The fifth command uses the Undo-Transaction cmdlet to roll back the transaction. As a result, all commands performed within the transaction are reversed.

    The final command uses the ToString method to display the resulting value of $TransactedString as a string. The results show that only the changes made outside of the transaction were applied to the object.

RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=135271
    about_transactions
    Start-Transaction
    Get-Transaction
    Complete-Transaction
    Undo-Transaction

cmdlet, Path, Test

Test-Path

NAME
    Test-Path

SYNOPSIS
    Determines whether all elements of a path exist.

SYNTAX
    Test-Path [-LiteralPath] <string[]> [-Credential <PSCredential>] [-Exclude <string[]>] [-Filter <string>] [-Include <string[]>] [-IsValid] [-PathType {Any | Container | Leaf}] [-UseTransaction] [<CommonParameters>]

    Test-Path [-Path] <string[]> [-Credential <PSCredential>] [-Exclude <string[]>] [-Filter <string>] [-Include <string[]>] [-IsValid] [-PathType {Any | Container | Leaf}] [-UseTransaction] [<CommonParameters>]

DESCRIPTION
    The Test-Path cmdlet determines whether all elements of the path exist. It returns TRUE ($true) if all elements exist and FALSE ($false) if any are missing. It can also tell whether the path syntax is valid and whether the path leads to a container or a terminal (leaf) element.

PARAMETERS
    -Credential <PSCredential>
        Specifies a user account that has permission to perform this action. The default is the current user.

        Type a user name, such as “User01” or “Domain01\User01”. Or, enter a PSCredential object, such as one generated by the Get-Credential cmdlet. If you type a user name, you will be prompted for a password.

        This parameter is not supported by any providers installed with Windows PowerShell.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Exclude <string[]>
        Omits the specified items. The value of this parameter qualifies the Path parameter. Enter a path element or pattern, such as “*.txt”. Wildcards are permitted.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Filter <string>
        Specifies a filter in the provider’s format or language. The value of this parameter qualifies the Path parameter. The syntax of the filter, including the use of wildcards, depends on the provider. Filters are more efficient than other parameters, because the provider applies them when retrieving the objects rather than having Windows PowerShell filter the objects after they are retrieved.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Include <string[]>
        Tests only the specified paths. The value of this parameter qualifies the Path parameter. Enter a path element or pattern, such as “*.txt”. Wildcards are permitted.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -IsValid [<SwitchParameter>]
        Determines whether the syntax of the path is correct, regardless of whether the elements of the path exist. This parameter returns TRUE if the path syntax is valid and FALSE if it is not.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -LiteralPath <string[]>
        Specifies a path to be tested. Unlike Path, the value of the LiteralPath parameter is used exactly as it is typed. No characters are interpreted as wildcards. If the path includes escape characters, enclose it in single quotation marks. Single quotation marks tell Windows PowerShell not to interpret any characters as escape sequences.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Path <string[]>
        Specifies a path to be tested. Wildcards are permitted. If the path includes spaces, enclose it in quotation marks. The parameter name (“Path”) is optional.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByValue, ByPropertyName)
        Accept wildcard characters? false

    -PathType <TestPathType>
        Tells whether the final element in the path is of a particular type. This parameter returns TRUE if the element is of the specified type and FALSE if it is not.

        Valid values are:
        — Container: An element that contains other elements, such as a directory or Registry key.

        — Leaf: An element that does not contain other elements, such as a file.

        — Any: Either a container or a leaf.Tells whether the final element in the path is of a particular type. Returns TRUE if the element is of the specified type and FALSE if it is not.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -UseTransaction [<SwitchParameter>]
        Includes the command in the active transaction. This parameter is valid only when a transaction is in progress. For more information, see about_transactions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer and OutVariable. For more information, type,
        “Get-Help about_CommonParameters“.

INPUTS
    System.String
        You can pipe a string that contains a path (but not a literal path) to Test-Path.

OUTPUTS
    System.Boolean
        The cmdlet returns “True” when the path exists and “False” when it does not.

NOTES

        The cmdlets that contain the Path noun (the Path cmdlets) manipulate path names and return the names in a concise format that all Windows PowerShell providers can interpret. They are designed for use in programs and scripts where you want to display all or part of a path name in a particular format. Use them like you would use Dirname, Normpath, Realpath, Join, or other path manipulators.

         You can use the Path cmdlets with several providers, including the FileSystem, Registry, and Certificate providers.

        The Test-Path cmdlet is designed to work with the data exposed by any provider. To list the providers available in your session, type “Get-PSProvider“. For more information, see about_providers.

    ————————– EXAMPLE 1 ————————–

    C:\PS>Test-Path -Path “C:\Documents and Settings\NicoleH”

    Description
    ———–
    This command tells whether all elements in the path exist, that is, the C: directory, the Documents and Settings directory, and the NicoleH directory. If any are missing, the cmdlet returns FALSE. Otherwise, it returns TRUE.

    ————————– EXAMPLE 2 ————————–

    C:\PS>Test-Path -Path $profile

    C:\PS>Test-Path -Path $profile -IsValid

    Description
    ———–
    These commands test the path to the Windows PowerShell profile.

    The first command determines whether all elements in the path exist. The second command determines whether the syntax of the path is correct. In this case, the path is FALSE, but the syntax is correct (TRUE). These commands use $profile, the automatic Variable that points to the location for the profile, even if the profile does not exist.

    For more information about automatic Variables, see about_Automatic_Variables.

    ————————– EXAMPLE 3 ————————–

    C:\PS>Test-Path -Path “C:\CAD\Commercial Buildings\*” -Exclude *.dwg

    Description
    ———–
    This command tells whether there are any files in the Commercial Buildings directory other than .dwg files.

    The command uses the Path parameter to specify the path. Because it includes a space, the path is enclosed in quotes. The asterisk at the end of the path indicates the contents of the Commercial Building directory. (With long paths, like this one, type the first few letters of the path, and then use the TAB key to complete the path.)

    The command uses the Exclude parameter to specify files that will be omitted from the evaluation.

    In this case, because the directory contains only .dwg files, the result is FALSE.

    ————————– EXAMPLE 4 ————————–

    C:\PS>Test-Path -Path $profile -Pathtype leaf

    Description
    ———–
    This command tells whether the path stored in the $profile Variable leads to a file. In this case, because the Windows PowerShell profile is a .ps1 file, the cmdlet returns TRUE.

    ————————– EXAMPLE 5 ————————–

    C:\PS>Test-Path -Path HKLM:\Software\Microsoft\PowerShell\1\ShellIds\Microsoft.PowerShell

    TRUE

    C:\PS> Test-Path -Path HKLM:\Software\Microsoft\PowerShell\1\ShellIds\Microsoft.PowerShell\ExecutionPolicy
    FALSE

    Description
    ———–
    These commands use the Test-Path cmdlet with the Windows PowerShell Registry provider.

    The first command tests whether the Registry path to the Microsoft.PowerShell Registry key is correct on the system. If Windows PowerShell is installed correctly, the cmdlet returns TRUE.

    Test-Path does not work correctly with all Windows PowerShell providers. For example, you can use Test-Path to test the path to a Registry key, but if you use it to test the path to a Registry entry, it always returns FALSE, even if the Registry entry is present.

RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=113418
    about_providers
    Convert-Path
    Split-Path
    Resolve-Path
    Join-Path

cmdlet, Path, Split

Split-Path

NAME
    Split-Path

SYNOPSIS
    Returns the specified part of a path.

SYNTAX
    Split-Path [-IsAbsolute] [-Path] <string[]> [-Credential <PSCredential>] [-LiteralPath <string[]>] [-Resolve] [-UseTransaction] [<CommonParameters>]

    Split-Path [-Leaf] [-Path] <string[]> [-Credential <PSCredential>] [-LiteralPath <string[]>] [-Resolve] [-UseTransaction] [<CommonParameters>]

    Split-Path [-NoQualifier] [-Path] <string[]> [-Credential <PSCredential>] [-LiteralPath <string[]>] [-Resolve] [-UseTransaction] [<CommonParameters>]

    Split-Path [-Parent] [-Path] <string[]> [-Credential <PSCredential>] [-LiteralPath <string[]>] [-Resolve] [-UseTransaction] [<CommonParameters>]

    Split-Path [[-Qualifier]] [-Path] <string[]> [-Credential <PSCredential>] [-LiteralPath <string[]>] [-Resolve] [-UseTransaction] [<CommonParameters>]

DESCRIPTION
    The Split-Path cmdlet returns only the specified part of a path, such as the parent directory, a child directory, or a file name. It also can display the items that are referenced by the split path and tell whether the path is relative or absolute.

    You can use this cmdlet to display or submit only a selected part of a path.

PARAMETERS
    -Credential <PSCredential>
        Specifies a user account that has permission to perform this action. The default is the current user.

        Type a user name, such as “User01” or “Domain01\User01”. Or, enter a PSCredential object, such as one generated by the Get-Credential cmdlet. If you type a user name, you will be prompted for a password.

        This parameter is not supported by any providers installed with Windows PowerShell.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -IsAbsolute [<SwitchParameter>]
        Returns TRUE if the path is absolute and FALSE if it is relative. An absolute path has a length greater than zero and does not use a dot ( . ) to indicate the current path.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Leaf [<SwitchParameter>]
        Returns only the last item or container in the path. For example, in the path “C:\Test\Logs\Pass1.log”, it returns only “Pass1.log”.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -LiteralPath <string[]>
        Specifies the paths to be split. Unlike Path, the value of LiteralPath is used exactly as it is typed. No characters are interpreted as wildcards. If the path includes escape characters, enclose it in single quotation marks. Single quotation marks tell Windows PowerShell not to interpret any characters as escape sequences.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -NoQualifier [<SwitchParameter>]
        Returns the path without the qualifier. For the FileSystem or Registry providers, the qualifier is the drive of the provider path, such as C: or HKCU:. For example, in the path “C:\Test\Logs\Pass1.log”, it returns only “\Test\Logs\Pass1.log”.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Parent [<SwitchParameter>]
        Returns only the parent containers of the item or of the container specified by the path. For example, in the path “C:\Test\Logs\Pass1.log”, it returns “C:\Test\Logs”. The Parent parameter is the default split location parameter.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Path <string[]>
        Specifies the paths to be split. Wildcards are permitted. If the path includes spaces, enclose it in quotation marks. You can also pipe a path to Split-Path.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByValue, ByPropertyName)
        Accept wildcard characters? false

    -Qualifier [<SwitchParameter>]
        Returns only the qualifier of the specified path. For the FileSystem or Registry providers, the qualifier is the drive of the provider path, such as C: or HKCU:.

        Required?                    false
        Position?                    2
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Resolve [<SwitchParameter>]
        Displays the items that are referenced by the resulting split path instead of displaying the path elements.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -UseTransaction [<SwitchParameter>]
        Includes the command in the active transaction. This parameter is valid only when a transaction is in progress. For more information, see about_transactions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer and OutVariable. For more information, type,
        “Get-Help about_CommonParameters“.

INPUTS
    System.String
        You can pipe a string that contains a path to Split-Path.

OUTPUTS
    System.String
        The Split-Path cmdlet returns text strings. When you use the Resolve parameter, Split-Path returns a string that describes the location of the items; it does not return objects that represent the items, such as a FileInfo or RegistryKey object.

NOTES

        The split location parameters (Qualifier, Parent, Leaf, and NoQualifier) are exclusive. You can use only one in each command.

        The cmdlets that contain the Path noun (the Path cmdlets) manipulate path names and return the names in a concise format that all Windows PowerShell providers can interpret. They are designed for use in programs and scripts where you want to display all or part of a path name in a particular format. Use them like you would use Dirname, Normpath, Realpath, Join, or other path manipulators.

        You can use the Path cmdlets with several providers, including the FileSystem, Registry, and Certificate providers.

        The Split-Path cmdlet is designed to work with the data exposed by any provider. To list the providers available in your session, type “Get-PSProvider“. For more information, see about_providers.

    ————————– EXAMPLE 1 ————————–

    C:\PS>Split-Path “HKCU:\Software\Microsoft” -qualifier

    HKCU:

    Description
    ———–
    This command returns only the qualifier (the drive) of the path.

    ————————– EXAMPLE 2 ————————–

    C:\PS>Split-Path “C:\Test\Logs\*.log” -leaf -Resolve

    Pass1.log
    Pass2.log
    …

    Description
    ———–
    This command displays the files that are referenced by the split path. Because this path is split to the last item (the “leaf”), only the file names of the paths are displayed.

    The Resolve parameter tells Split-Path to display the items that the split path references, instead of displaying the split path.

    Like all Split-Path commands, this command returns strings. It does not return FileInfo Objects representing the files.

    ————————– EXAMPLE 3 ————————–

    C:\PS>Split-Path “C:\WINDOWS\system32\WindowsPowerShell\V1.0\about_*.txt”

    C:\WINDOWS\system32\WindowsPowerShell\V1.0

    Description
    ———–
    This command returns only the parent containers of the path. Because it does not include any parameters to specify the split, Split-Path uses the split location default, which is Parent.

    ————————– EXAMPLE 4 ————————–

    C:\PS>Split-Path “.\My Pictures\*.jpg” -IsAbsolute

    False

    Description
    ———–
    This command determines whether the path is relative or absolute. In this case, because the path is relative to the current directory, which is represented by a dot (.), it returns FALSE ($false).

    ————————– EXAMPLE 5 ————————–

    C:\PS>Set-Location (Split-Path $profile)

    PS C:\Documents and Settings\juneb\My Documents\WindowsPowerShell>

    Description
    ———–
    This command changes your location to the directory that contains the Windows PowerShell profile.
    The command in parentheses uses the Split-Path cmdlet to return only the parent of the path stored in the built-in $Profile Variable. (The Parent parameter is the default split location parameter, so you can omit it from the command.) The parentheses direct Windows PowerShell to execute the command first. This is a handy way to navigate to a directory with a long path name.

    ————————– EXAMPLE 6 ————————–

    C:\PS>’C:\Documents and Settings\User01\My Documents\My Pictures’ | Split-Path

    C:\Documents and Settings\User01\My Documents

    Description
    ———–
    This command uses a pipeline operator (|) to send a path to the Split-Path cmdlet. The path is enclosed in quotation marks to indicate that it is a single token.

RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=113404
    about_providers
    Test-Path
    Convert-Path
    Resolve-Path
    Join-Path

cmdlet, ItemProperty, Set

Set-ItemProperty

NAME
    Set-ItemProperty

SYNOPSIS
    Creates or changes the value of a property of an item.

SYNTAX
    Set-ItemProperty [-LiteralPath] <string[]> -InputObject <psobject> [-Credential <PSCredential>] [-Exclude <string[]>] [-Filter <string>] [-Force] [-Include <string[]>] [-PassThru] [-Confirm] [-WhatIf] [-UseTransaction] [<CommonParameters>]

    Set-ItemProperty [-Path] <string[]> -InputObject <psobject> [-Credential <PSCredential>] [-Exclude <string[]>] [-Filter <string>] [-Force] [-Include <string[]>] [-PassThru] [-Confirm] [-WhatIf] [-UseTransaction] [<CommonParameters>]

    Set-ItemProperty [-LiteralPath] <string[]> [-Name] <string> [-Value] <Object> [-Credential <PSCredential>] [-Exclude <string[]>] [-Filter <string>] [-Force] [-Include <string[]>] [-PassThru] [-Confirm] [-WhatIf] [-UseTransaction] [<CommonParameters>]

    Set-ItemProperty [-Path] <string[]> [-Name] <string> [-Value] <Object> [-Credential <PSCredential>] [-Exclude <string[]>] [-Filter <string>] [-Force] [-Include <string[]>] [-PassThru] [-Confirm] [-WhatIf] [-UseTransaction] [<CommonParameters>]

DESCRIPTION
    The Set-ItemProperty cmdlet changes the value of the property of the specified item. You can use the cmdlet to establish or change the properties of items. For example, you can use Set-ItemProperty to set the value of the IsReadOnly property of a file object to true.

    You also use Set-ItemProperty to create and change Registry values and data. For example, you can add a new Registry entry to a key and establish or change its value.

PARAMETERS
    -Credential <PSCredential>
        Specifies a user account that has permission to perform this action. The default is the current user.

        Type a user name, such as “User01” or “Domain01\User01”, or enter a PSCredential object, such as one generated by the Get-Credential cmdlet. If you type a user name, you will be prompted for a password.

        This parameter is not supported by any providers installed with Windows PowerShell.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Exclude <string[]>
        Specifies those items upon which the cmdlet is not to act, and includes all others.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Filter <string>
        Specifies a filter in the provider’s format or language. The value of this parameter qualifies the Path parameter. The syntax of the filter, including the use of wildcards, depends on the provider. Filters are more efficient than other parameters, because the provider applies them when retrieving the objects rather than having Windows PowerShell filter the objects after they are retrieved.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Force [<SwitchParameter>]
        Allows the cmdlet to set a property on items that cannot otherwise be accessed by the user. Implementation varies from provider to provider. For more information, see about_providers.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Include <string[]>
        Specifies only those items upon which the cmdlet will act, excluding all others.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -InputObject <psobject>
        Specifies the object that has the properties that you want to change. Enter a Variable that contains the object or a command that gets the object.

        Required?                    true
        Position?                    named
        Default value
        Accept pipeline input?     true (ByValue, ByPropertyName)
        Accept wildcard characters? false

    -LiteralPath <string[]>
        Specifies a path to the item property. The value of LiteralPath is used exactly as it is typed. No characters are interpreted as wildcards. If the path includes escape characters, enclose it in single quotation marks. Single quotation marks tell Windows PowerShell not to interpret any characters as escape sequences.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Name <string>
        Specifies the name of the property.

        Required?                    true
        Position?                    2
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -PassThru [<SwitchParameter>]
        Returns an object representing the item property. By default, this cmdlet does not generate any output.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Path <string[]>
        Specifies the path to the items with the property to be set.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Value <Object>
        Specifies the value of the property.

        Required?                    true
        Position?                    3
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Confirm [<SwitchParameter>]
        Prompts you for confirmation before executing the command.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -WhatIf [<SwitchParameter>]
        Describes what would happen if you executed the command without actually executing the command.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -UseTransaction [<SwitchParameter>]
        Includes the command in the active transaction. This parameter is valid only when a transaction is in progress. For more information, see about_transactions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer and OutVariable. For more information, type,
        “Get-Help about_CommonParameters“.

INPUTS
    System.Management.Automation.PSObject
        You can pipe objects to Set-ItemProperty.

OUTPUTS
    None or System.Management.Automation.PSCustomObject
        When you use the PassThru parameter, Set-ItemProperty generates a PSCustomObject object that represents the item that was changed and its new property value. Otherwise, this cmdlet does not generate any output.

NOTES

        The Set-ItemProperty cmdlet is designed to work with the data exposed by any provider. To list the providers available in your session, type “Get-PSProvider“. For more information, see about_providers.

    ————————– EXAMPLE 1 ————————–

    C:\PS>Set-Itemproperty -Path c:\GroupFiles\final.doc -Name IsReadOnly -Value $true

    Description
    ———–
    This command sets the value of the IsReadOnly property of the final.doc file to true.

    The command uses the Set-ItemProperty cmdlet to change the value of the property of the final.doc file. It uses the Path parameter to specify the file. It uses the Name parameter to specify the name of the property and the Value parameter to specify the new value.

    The $true automatic Variable represents a value of TRUE. For more information, see about_Automatic_Variables.

    The file is a System.IO.FileInfo object and IsReadOnly is just one of its properties. To see all of the properties and methods of a FileInfo object, pipe the file to the Get-Member cmdlet. For example, “final.doc | Get-Member“.

    ————————– EXAMPLE 2 ————————–

    C:\PS>Set-Itemproperty -Path HKLM:\Software\MyCompany -Name NoOfEmployees -Value 823

    C:\PS>Get-Itemproperty -Path HKLM:\Software\MyCompany

    PSPath        : Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\software\mycompany
    PSParentPath : Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\software
    PSChildName : mycompany
    PSDrive     : HKLM
    PSProvider    : Microsoft.PowerShell.Core\Registry
    NoOfLocations : 2
    NoOfEmployees : 823

    C:\PS>Set-Itemproperty -Path HKLM:\Software\MyCompany -Name NoOfEmployees -Value 824
    C:\PS>Get-Itemproperty -Path HKLM:\Software\MyCompany

    PSPath        : Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\software\mycompany
    PSParentPath : Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\software
    PSChildName : mycompany
    PSDrive     : HKLM
    PSProvider    : Microsoft.PowerShell.Core\Registry
    NoOfLocations : 2
    NoOfEmployees : 824

    Description
    ———–
    This example shows how to use Set-ItemProperty to create a new Registry entry and to assign a value to the entry. It creates the NoOfEmployees entry in the MyCompany key in HKLM\Software key and sets its value to 823.

    Because Registry entries are considered to be properties of the Registry keys (which are items), you use Set-ItemProperty to create Registry entries, and to establish and change their values.

    The first command uses the Set-ItemProperty cmdlet to create the Registry entry. It uses the Path parameter to specify the path to the HKLM: drive and the Software\MyCompany key. It uses the Name parameter to specify the entry name and the Value parameter to specify a value.

    The second command uses the Get-ItemProperty cmdlet to see the new Registry entry. If you use the Get-Item or Get-ChildItem cmdlets, the entries do not appear because they are properties of a key, not items or child items.

    The third command changes the value of the NoOfEmployees entry to 824.

    You can also use the New-ItemProperty cmdlet to create the Registry entry and its value and then use Set-ItemProperty to change the value.

    For more information about the HKLM: drive, type “Get-Help Get-PSDrive“. For more information about using Windows PowerShell to manage the Registry, type “Get-Help Registry“.

    ————————– EXAMPLE 3 ————————–

    C:\PS>Get-ChildItem weekly.txt | Set-Itemproperty -Name IsReadOnly -Value $true

    Description
    ———–
    These commands show how to use a pipeline operator (|) to send an item to Set-ItemProperty.

    The first part of the command uses the Get-ChildItem cmdlet to get an object that represents the Weekly.txt file. The command uses a pipeline operator to send the file object to Set-ItemProperty. The Set-ItemProperty command uses the Name and Value parameters to specify the property and its new value.

    This command is equivalent to using the InputObject parameter to specify the object that Get-ChildItem gets.

RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=113396
    about_providers
    Get-ItemProperty
    New-ItemProperty
    Clear-ItemProperty
    Remove-ItemProperty
    Rename-ItemProperty
    Move-ItemProperty
    Copy-ItemProperty

cmdlet, Location, Set

Set-Location

NAME
    Set-Location

SYNOPSIS
    Sets the current working location to a specified location.

SYNTAX
    Set-Location [-LiteralPath] <string> [-PassThru] [-UseTransaction] [<CommonParameters>]

    Set-Location [[-Path] <string>] [-PassThru] [-UseTransaction] [<CommonParameters>]

    Set-Location [-StackName <string>] [-PassThru] [-UseTransaction] [<CommonParameters>]

DESCRIPTION
    The Set-Location cmdlet sets the working location to a specified location. That location could be a directory, a sub-directory, a Registry location, or another location stack.

PARAMETERS
    -LiteralPath <string>
        Specifies a path to the location. The value of the LiteralPath parameter is used exactly as it is typed. No characters are interpreted as wildcards. If the path includes escape characters, enclose it in single quotation marks. Single quotation marks tell Windows PowerShell not to interpret any characters as escape sequences.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -PassThru [<SwitchParameter>]
        Passes an object representing the location to the pipeline. By default, this cmdlet does not generate any output.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Path <string>
        This parameter is used to specify the path to a new working location.

        Required?                    false
        Position?                    1
        Default value
        Accept pipeline input?     true (ByValue, ByPropertyName)
        Accept wildcard characters? false

    -StackName <string>
        The name of the stack to which the location is being set.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -UseTransaction [<SwitchParameter>]
        Includes the command in the active transaction. This parameter is valid only when a transaction is in progress. For more information, see about_transactions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer and OutVariable. For more information, type,
        “Get-Help about_CommonParameters“.

INPUTS
    System.String
        You can pipe a string that contains a path (but not a literal path) to Set-Location.

OUTPUTS
    None or System.Management.Automation.PathInfo
        When you use the PassThru parameter, Set-Location generates a System.Management.Automation.PathInfo object that represents the location. Otherwise, this cmdlet does not generate any output.

NOTES

        The Set-Location cmdlet is designed to work with the data exposed by any provider. To list the providers available in your session, type “Get-PSProvider“. For more information, see about_providers.

    ————————– EXAMPLE 1 ————————–

    C:\PS>Set-Location HKLM:

    Description
    ———–
    This will set the current location to the one specified; in this case, it is the HKLM provider.

    ————————– EXAMPLE 2 ————————–

    C:\PS>Set-Location env: -PassThru

    Path
    —-
    Env:\

    Description
    ———–
    This will set the current location to the one specified; in this case, it is the Environment Variable provider.

    ————————– EXAMPLE 3 ————————–

    C:\PS>Set-Location C:

    Description
    ———–
    This will set the current location to the one specified; in this case, it is the C: drive in the file system provider.

RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=113397
    about_providers
    Get-Location
    Pop-Location
    Push-Location

Acl, cmdlet, Set

Set-Acl

NAME
    Set-Acl

SYNOPSIS
    Changes the security descriptor of a specified resource, such as a file or a Registry key.

SYNTAX
    Set-Acl [-Path] <string[]> [-AclObject] <ObjectSecurity> [-Exclude <string[]>] [-Filter <string>] [-Include <string[]>] [-Passthru] [-Confirm] [-WhatIf] [-UseTransaction] [<CommonParameters>]

DESCRIPTION
    The Set-Acl cmdlet changes the security descriptor of a specified resource, such as a file or a Registry key, to match the values in a security descriptor that you supply.

    To use Set-Acl, use the Path parameter to identify the resource whose security descriptor you want to change, and use the AclObject parameter to supply a security descriptor that has the values you want to apply. Set-Acl uses the value of the AclObject parameter as a model and changes the values in the resource’s security descriptor to match the values in the AclObject parameter.

PARAMETERS
    -AclObject <ObjectSecurity>
        Specifies an ACL with the desired property values. Set-Acl changes the ACL of resource specified by the Path parameter to match the values in the specified security object.

        You can save the output of a Get-Acl command in a Variable and then use the AclObject parameter to pass the Variable, or type a Get-Acl command.

        Required?                    true
        Position?                    2
        Default value
        Accept pipeline input?     true (ByValue)
        Accept wildcard characters? false

    -Exclude <string[]>
        Omits the specified items. The value of this parameter qualifies the Path parameter. Enter a path element or pattern, such as “*.txt”. Wildcards are permitted.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Filter <string>
        Specifies a filter in the provider’s format or language. The value of this parameter qualifies the Path parameter. The syntax of the filter, including the use of wildcards, depends on the provider. Filters are more efficient than other parameters, because the provider applies them when retrieving the objects, rather than having Windows PowerShell filter the objects after they are retrieved.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Include <string[]>
        Changes only the specified items. The value of this parameter qualifies the Path parameter. Enter a path element or pattern, such as “*.txt”. Wildcards are permitted.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Passthru [<SwitchParameter>]
        Returns an object representing the security descriptor. By default, this cmdlet does not generate any output.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Path <string[]>
        Identifies the resource whose security descriptor you want to change. Enter the path to a resource, such as a path to a file or Registry key. Wildcards are permitted.

        If you pass a security object to Set-Acl (either by using the AclObject parameter or by passing an object from Get-Acl to Set-Acl), and you omit the Path parameter (name and value), Set-Acl uses the path that is included in the security object.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Confirm [<SwitchParameter>]
        Prompts you for confirmation before executing the command.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -WhatIf [<SwitchParameter>]
        Describes what would happen if you executed the command without actually executing the command.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -UseTransaction [<SwitchParameter>]
        Includes the command in the active transaction. This parameter is valid only when a transaction is in progress. For more information, see about_transactions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer and OutVariable. For more information, type,
        “Get-Help about_CommonParameters“.

INPUTS
    System.Security.AccessControl.ObjectSecurity
        You can pipe a security descriptor to Set-Acl.

OUTPUTS
    None or security object
        By default, Set-Acl does not generate any output. However, if you use the -Passthru parameter, it generates a security object. The type of the security object depends on the type of the resource.

NOTES

        The Set-Acl cmdlet is supported by the Windows PowerShell file system and Registry providers. As such, you can use it to change the security descriptors of files, directories, and Registry keys.

        When specifying multiple values for a parameter, use commas to separate the values. For example, “<parameter-name> <value1>, <value2>”.

    ————————– EXAMPLE 1 ————————–

    C:\PS>$DogACL = Get-Acl c:\dog.txt

    C:\PS>Set-Acl -Path C:\cat.txt -AclObject $DogACL

    Description
    ———–
    These commands copy the values from the security descriptor of the Dog.txt file to the security descriptor of the Cat.txt file. When the commands complete, the security descriptors of the Dog.txt and Cat.txt files are identical.

    The first command uses the Get-Acl cmdlet to get the security descriptor of the Dog.txt file. The assignment operator (=) stores the security descriptor in the value of the $DogACL Variable.

    The second command uses Set-Acl to change the values in the ACL of Cat.txt to the values in $DogACL.

    The value of the Path parameter is the path to the Cat.txt file. The value of the AclObject parameter is the model ACL, in this case, the ACL of Dog.txt as saved in the $DogACL Variable.

    ————————– EXAMPLE 2 ————————–

    C:\PS>Get-Acl c:\dog.txt | Set-Acl -Path C:\cat.txt

    Description
    ———–
    This command is almost the same as the command in the previous example, except that it uses a pipeline operator to send the security descriptor retrieved in a Get-Acl command to a Set-Acl command.

    The first command uses the Get-Acl cmdlet to get the security descriptor of the Dog.txt file. The pipeline operator (|) passes an object that represents the Dog.txt security descriptor to the Set-Acl command.

    The second command uses Set-Acl to apply the security descriptor of Dog.txt to Cat.txt. When the command completes, the ACLs of the Dog.txt and Cat.txt files are identical.

    ————————– EXAMPLE 3 ————————–

    C:\PS>$newACL = Get-Acl file0.txt

    C:\PS>Get-ChildItem c:\temp -recurse -Include *.txt -force | Set-Acl -AclObject $newacl

    Description
    ———–
    These commands apply the security descriptors in the File0.txt file to all text files in the C:\Temp directory and all of its subdirectories.

    The first command gets the security descriptor of the File0.txt file in the current directory and uses the assignment operator (=) to store it in the $newACL Variable.

    The first command in the pipeline uses the Get-ChildItem cmdlet to get all of the text files in the C:\Temp directory. The Recurse parameter extends the command to all subdirectories of C:\temp. The Include parameter limits the files retrieved to those with the “.txt” file name extension. The Force parameter gets hidden files, which would otherwise be excluded. (You cannot use “c:\temp\*.txt”, because the Recurse parameter works on directories, not on files.)

    The pipeline operator (|) sends the objects representing the retrieved files to Set-Acl command, which applies the security descriptor in the AclObject parameter to all of the files in the pipeline.

    In practice, it is best to use the Whatif parameter with all Set-Acl commands that can affect more than one resource. In this case, the second command in the pipeline would be “Set-Acl -AclObject $newacl -WhatIf“. This command lists the files that would be affected by the command. After reviewing the result, you can run the command again without the Whatif parameter.

RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=113389
    Get-Acl

cmdlet, Content, Set

Set-Content

NAME
    Set-Content

SYNOPSIS
    Writes or replaces the content in an item with new content.

SYNTAX
    Set-Content [-LiteralPath] <string[]> [-Value] <Object[]> [-Credential <PSCredential>] [-Exclude <string[]>] [-Filter <string>] [-Force] [-Include <string[]>] [-PassThru] [-Confirm] [-WhatIf] [-UseTransaction] [<CommonParameters>]

    Set-Content [-Path] <string[]> [-Value] <Object[]> [-Credential <PSCredential>] [-Exclude <string[]>] [-Filter <string>] [-Force] [-Include <string[]>] [-PassThru] [-Confirm] [-WhatIf] [-UseTransaction] [<CommonParameters>]

DESCRIPTION
    The Set-Content cmdlet is a string-processing cmdlet that writes or replaces the content in the specified item, such as a file. Whereas the Add-Content cmdlet appends content to a file, Set-Content replaces the existing content. You can type the content in the command or send content through the pipeline to Set-Content.

PARAMETERS
    -Credential <PSCredential>
        Specifies a user account that has permission to perform this action. The default is the current user.

        Type a user name, such as “User01” or “Domain01\User01”, or enter a PSCredential object, such as one generated by the Get-Credential cmdlet. If you type a user name, you will be prompted for a password.

        This parameter is not supported by any providers installed with Windows PowerShell

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Exclude <string[]>
        Omits the specified items. The value of this parameter qualifies the Path parameter. Enter a path element or pattern, such as “*.txt”. Wildcards are permitted.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Filter <string>
        Specifies a filter in the provider’s format or language. The value of this parameter qualifies the Path parameter. The syntax of the filter, including the use of wildcards, depends on the provider. Filters are more efficient than other parameters, because the provider applies them when retrieving the objects, rather than having Windows PowerShell filter the objects after they are retrieved.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Force [<SwitchParameter>]
        Allows the cmdlet to set the contents of a file, even if the file is read-only. Implementation varies from provider to provider. For more information, see about_providers. Even using the Force parameter, the cmdlet cannot override security restrictions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Include <string[]>
        Changes only the specified items. The value of this parameter qualifies the Path parameter. Enter a path element or pattern, such as “*.txt”. Wildcards are permitted.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -LiteralPath <string[]>
        Specifies the path to the item that will receive the content. Unlike Path, the value of LiteralPath is used exactly as it is typed. No characters are interpreted as wildcards. If the path includes escape characters, enclose it in single quotation marks. Single quotation marks tell Windows PowerShell not to interpret any characters as escape sequences.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -PassThru [<SwitchParameter>]
        Returns an object representing the content. By default, this cmdlet does not generate any output.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Path <string[]>
        Specifies the path to the item that will receive the content. Wildcards are permitted.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Value <Object[]>
        Specifies the new content for the item.

        Required?                    true
        Position?                    2
        Default value
        Accept pipeline input?     true (ByValue, ByPropertyName)
        Accept wildcard characters? false

    -Confirm [<SwitchParameter>]
        Prompts you for confirmation before executing the command.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -WhatIf [<SwitchParameter>]
        Describes what would happen if you executed the command without actually executing the command.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -UseTransaction [<SwitchParameter>]
        Includes the command in the active transaction. This parameter is valid only when a transaction is in progress. For more information, see about_transactions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer and OutVariable. For more information, type,
        “Get-Help about_CommonParameters“.

INPUTS
    System.Object
        You can pipe an object that contains the new value for the item to Set-Content.

OUTPUTS
    None or System.String
        When you use the Passthru parameter, Set-Content generates a System.String object representing the content. Otherwise, this cmdlet does not generate any output.

NOTES

        You can also refer to Set-Content by its built-in Alias, “sc”. For more information, see about_aliases.

        Set-Content is designed for string processing. If you pipe non-string objects to Set-Content, it converts the object to a string before writing it. To write objects to files, use Out-File.

        The Set-Content cmdlet is designed to work with the data exposed by any provider. To list the providers available in your session, type “Get-PSProvider“. For more information, see about_providers.

    ————————– EXAMPLE 1 ————————–

    C:\PS>Set-Content -Path C:\Test1\test*.txt -Value “Hello, World”

    Description
    ———–
    This command replaces the contents of all files in the Test1 directory that have names beginning with “test” with “Hello, World”. This example shows how to specify content by typing it in the command.

    ————————– EXAMPLE 2 ————————–

    C:\PS>Get-Date | Set-Content C:\Test1\date.csv

    Description
    ———–
    This command creates a comma-separated Variable-length (csv) file that contains only the current date and time. It uses the Get-Date cmdlet to get the current system date and time. The pipeline operator passes the result to Set-Content, which creates the file and writes the content.

    If the Test1 directory does not exist, the command fails, but if the file does not exist, the command will create it.

    ————————– EXAMPLE 3 ————————–

    C:\PS>(Get-Content Notice.txt) | ForEach-Object {$_ -replace “Warning”, “Caution”} | Set-Content Notice.txt

    Description
    ———–
    This command replaces all instances of “Warning” with “Caution” in the Notice.txt file.

    It uses the Get-Content cmdlet to get the content of Notice.txt. The pipeline operator sends the results to the ForEach-Object cmdlet, which applies the expression to each line of content in Get-Content. The expression uses the “$_” symbol to refer to the current item and the Replace parameter to specify the text to be replaced.

    Another pipeline operator sends the changed content to Set-Content which replaces the text in Notice.txt with the new content.

    The parentheses around the Get-Content command ensure that the Get operation is complete before the Set operation begins. Without them, the command will fail because the two Functions will be trying to access the same file.

RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=113392
    about_providers
    Add-Content
    Get-Content
    Clear-Content

cmdlet, Item, Set

Set-Item

NAME
    Set-Item

SYNOPSIS
    Changes the value of an item to the value specified in the command.

SYNTAX
    Set-Item [-LiteralPath] <string[]> [[-Value] <Object>] [-Credential <PSCredential>] [-Exclude <string[]>] [-Filter <string>] [-Force] [-Include <string[]>] [-PassThru] [-Confirm] [-WhatIf] [-UseTransaction] [<CommonParameters>]

    Set-Item [-Path] <string[]> [[-Value] <Object>] [-Credential <PSCredential>] [-Exclude <string[]>] [-Filter <string>] [-Force] [-Include <string[]>] [-PassThru] [-Confirm] [-WhatIf] [-UseTransaction] [<CommonParameters>]

DESCRIPTION
    The Set-Item cmdlet changes the value of an item, such as a Variable or Registry key, to the value specified in the command.

PARAMETERS
    -Credential <PSCredential>
        Specifies a user account that has permission to perform this action. The default is the current user.

        Type a user name, such as “User01” or “Domain01\User01”, or enter a PSCredential object, such as one generated by the Get-Credential cmdlet. If you type a user name, you will be prompted for a password.

        This parameter is not supported by any providers installed with Windows PowerShell.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Exclude <string[]>
        Omits the specified items. The value of this parameter qualifies the Path parameter. Enter a path element or pattern, such as “*.txt”. Wildcards are permitted.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Filter <string>
        Specifies a filter in the provider’s format or language. The value of this parameter qualifies the Path parameter. The syntax of the filter, including the use of wildcards, depends on the provider. Filters are more efficient than other parameters, because the provider applies them when retrieving the objects, rather than having Windows PowerShell filter the objects after they are retrieved.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Force [<SwitchParameter>]
        Allows the cmdlet to set items that cannot otherwise be changed, such as read-only Alias or Variables. The cmdlet cannot change constant Aliases or Variables. Implementation varies from provider to provider. For more information, see about_providers. Even using the Force parameter, the cmdlet cannot override security restrictions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Include <string[]>
        Changes only the specified items. The value of this parameter qualifies the Path parameter. Enter a path element or pattern, such as “*.txt”. Wildcards are permitted.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -LiteralPath <string[]>
        Specifies a path to the location of the new items. Unlike Path, the value of LiteralPath is used exactly as it is typed. No characters are interpreted as wildcards. If the path includes escape characters, enclose it in single quotation marks. Single quotation marks tell Windows PowerShell not to interpret any characters as escape sequences.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -PassThru [<SwitchParameter>]
        Passes an object representing the item to the pipeline. By default, this cmdlet does not generate any output.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Path <string[]>
        Specifies a path to the location of the new items. Wildcards are permitted.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Value <Object>
        Specifies a new value for the item.

        Required?                    false
        Position?                    2
        Default value
        Accept pipeline input?     true (ByValue, ByPropertyName)
        Accept wildcard characters? false

    -Confirm [<SwitchParameter>]
        Prompts you for confirmation before executing the command.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -WhatIf [<SwitchParameter>]
        Describes what would happen if you executed the command without actually executing the command.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -UseTransaction [<SwitchParameter>]
        Includes the command in the active transaction. This parameter is valid only when a transaction is in progress. For more information, see about_transactions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer and OutVariable. For more information, type,
        “Get-Help about_CommonParameters“.

INPUTS
    System.Object
        You can pipe an object that represents the new value of the item to Set-Item.

OUTPUTS
    None or an object representing the new or changed item.
        When you use the Passthru parameter, Set-Item generates an object representing the item. Otherwise, this cmdlet does not generate any output.

NOTES

        You can also refer to Set-Item by its built-in Alias, “si”. For more information, see about_aliases.

        The Set-Item cmdlet is not supported by the Windows PowerShell FileSystem provider. To change the values of items in the file system, use Set-Content.

        In the Registry drives, HKLM: and HKCU:, Set-Item changes the data in the (Default) value of a Registry key. To create and change the names of Registry keys, use New-Item and Rename-Item. To change the names and data in Registry values, use New-ItemProperty, Set-ItemProperty, and Rename-ItemProperty.

        The Set-Item cmdlet is designed to work with the data exposed by any provider. To list the providers available in your session, type “Get-PSProvider“. For more information, see about_providers.

    ————————– EXAMPLE 1 ————————–

    C:\PS>Set-Item -Path Alias:np -Value c:\windows\notepad.exe

    Description
    ———–
    This command creates an Alias of “np” for Notepad.

    ————————– EXAMPLE 2 ————————–

    C:\PS>Set-Item -Path env:UserRole -Value Administrator

    Description
    ———–
    This command uses the Set-Item cmdlet to change the value of the “UserRole” Environment Variable to “Administrator”.

    ————————– EXAMPLE 3 ————————–

    C:\PS>Set-Item -Path Function:prompt -Value {‘PS ‘+ $(Get-Date -format t) + ” ” + $(Get-Location) + ‘> ‘}

    Description
    ———–
    This command uses the Set-Item cmdlet to change the “prompt” Function so that it displays the time before the path.

    ————————– EXAMPLE 4 ————————–

    C:\PS>Set-Item -Path Function:prompt -options “AllScope,ReadOnly”

    Description
    ———–
    This command sets the AllScope and ReadOnly options for the “prompt” Function. This command uses the Options dynamic parameter of the Set-Item cmdlet. The Options parameter is available in Set-Item only when you use it with the Alias or Function provider.

RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=113395
    about_providers
    Get-Item
    New-Item
    Remove-Item
    Clear-Item
    Invoke-Item
    Rename-Item
    Move-Item
    Copy-Item

cmdlet, Item, Rename

Rename-Item

NAME
    Rename-Item

SYNOPSIS
    Renames an item in a Windows PowerShell provider namespace.

SYNTAX
    Rename-Item [-Path] <string> [-NewName] <string> [-Credential <PSCredential>] [-Force] [-PassThru] [-Confirm] [-WhatIf] [-UseTransaction] [<CommonParameters>]

DESCRIPTION
    The Rename-Item cmdlet changes the name of a specified item. This cmdlet does not affect the content of the item being renamed.

    You cannot use Rename-Item to move an item, such as by specifying a path along with the new name. To move and rename an item, use the Move-Item cmdlet.

PARAMETERS
    -Credential <PSCredential>
        Specifies a user account that has permission to perform this action. The default is the current user.

        Type a user name, such as “User01” or “Domain01\User01”, or enter a PSCredential object, such as one generated by the Get-Credential cmdlet. If you type a user name, you will be prompted for a password.

        This parameter is not supported by any providers installed with Windows PowerShell.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Force [<SwitchParameter>]
        Allows the cmdlet to rename items that cannot otherwise be changed, such as hidden or read-only files or read-only Aliases or Variables. The cmdlet cannot change constant Aliases or Variables. Implementation varies from provider to provider. For more information, see about_providers. Even using the Force parameter, the cmdlet cannot override security restrictions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -NewName <string>
        Specifies the new name of the item. Enter only a name, not a path and name. If you enter a path that is different from the path that is specified in the Path parameter, Rename-Item generates an error. To rename and move an item, use the Move-Item cmdlet.

        You cannot use wildcard characters in the value of NewName. To specify a name for multiple files, use the Replace operator in a regular expression. For more information about the Replace operator, type “Get-Help about_Comparison_Operators“. For a demonstration, see the examples.

        Required?                    true
        Position?                    2
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -PassThru [<SwitchParameter>]
        Passes an object representing the item to the pipeline. By default, this cmdlet does not generate any output.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Path <string>
        Specifies the path to the item to rename.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByValue, ByPropertyName)
        Accept wildcard characters? false

    -Confirm [<SwitchParameter>]
        Prompts you for confirmation before executing the command.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -WhatIf [<SwitchParameter>]
        Describes what would happen if you executed the command without actually executing the command.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -UseTransaction [<SwitchParameter>]
        Includes the command in the active transaction. This parameter is valid only when a transaction is in progress. For more information, see about_transactions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer and OutVariable. For more information, type,
        “Get-Help about_CommonParameters“.

INPUTS
    System.String
        You can pipe a string that contains a path to Rename-Item.

OUTPUTS
    None or an object representing the renamed item.
        When you use the Passthru parameter, Rename-Item generates an object representing the renamed item. Otherwise, this cmdlet does not generate any output.

NOTES

        The Rename-Item cmdlet is designed to work with the data exposed by any provider. To list the providers available in your session, type “Get-PSProvider“. For more information, see about_providers.

    ————————– EXAMPLE 1 ————————–

    C:\PS>Rename-Item -Path c:\logfiles\daily_file.txt -NewName monday_file.txt

    Description
    ———–
    This command renames the file daily_file.txt to monday_file.txt.

    ————————– EXAMPLE 2 ————————–

    C:\PS>Rename-Item -Path project.txt -NewName d:\archive\old-project.txt

    Rename-Item : Cannot rename because the target specified represents a path or device name.
    At line:1 char:12
    + Rename-Item <<<< -Path project.txt -NewName d:\archive\old-project.txt
        + CategoryInfo         : InvalidArgument: (:) [Rename-Item], PSArgumentException
        + FullyQualifiedErrorId : Argument,Microsoft.PowerShell.Commands.RenameItemCommand

    C:\PS> Move-Item -Path project.txt -destination d:\archive\old-project.txt
    # Command succeeds

    Description
    ———–
    This example shows that you cannot use the Rename-Item cmdlet to both rename and move an item. Specifically, you cannot supply a path for the value of the NewName parameter, unless the path is identical to the path specified in the Path parameter. Otherwise, only a new name is permitted.

    The first command uses the Rename-Item cmdlet to rename the project.txt file in the current directory to old-project.txt in the D:\Archive directory. The result is the error shown in the output.

    The second command shows the correct way to move and rename a file by using the Move-Item cmdlet. The Move-Item cmdlet lets you specify both a new path and a new name in the value of its Destination parameter.

    ————————– EXAMPLE 3 ————————–

    C:\PS>Rename-Item HKLM:\Software\MyCompany\Advertising -NewName Marketing

    Description
    ———–
    This command uses the Rename-Item cmdlet to rename a Registry key from Advertising to Marketing. When the command is complete, the key is renamed, but the Registry entries in the key are unchanged.

    ————————– EXAMPLE 4 ————————–

    C:\PS>Get-ChildItem *.txt | Rename-Item -NewName { $_.name -replace ‘\.txt’,’.log’ }

    Description
    ———–
    This example shows how to use the Replace operator to rename multiple files, even though the NewName parameter does not accept wildcard characters.

    This command renames all of the .txt files in the current directory to .log.

    The command uses a Get-ChildItem cmdlet to get all of the files in the current directory that have a .txt file name extension. Then, it uses the pipeline operator (|) to send the resulting files to the Rename-Item cmdlet.

    In the Rename-Item command, the value of the NewName parameter is a script block that is executed before the value is submitted to the NewName parameter.

    In the script block, the $_ automatic Variable represents each file object as it comes to the command through the pipeline. The command uses the dot format (.) to get the Name property of each file object. The Replace operator replaces the “.txt” file name extension of each file with “.log”.

    Because the Replace operator works with regular expressions, the dot preceding “txt” is interpreted to match any character. To ensure that it matches only a dot (.), it is escaped with a backslash character (\). The backslash character is not required in “.log” because it is a string, not a regular expression.

RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=113382
    about_providers
    Clear-Item
    Invoke-Item
    Move-Item
    Rename-ItemProperty
    Set-Item
    New-Item
    Remove-Item
    Get-Item
    Copy-Item

cmdlet, ItemProperty, Rename

Rename-ItemProperty

NAME
    Rename-ItemProperty

SYNOPSIS
    Renames a property of an item.

SYNTAX
    Rename-ItemProperty [-LiteralPath] <string> [-Name] <string> [-NewName] <string> [-Credential <PSCredential>] [-Exclude <string[]>] [-Filter <string>] [-Force] [-Include <string[]>] [-PassThru] [-Confirm] [-WhatIf] [-UseTransaction] [<CommonParameters>]

    Rename-ItemProperty [-Path] <string> [-Name] <string> [-NewName] <string> [-Credential <PSCredential>] [-Exclude <string[]>] [-Filter <string>] [-Force] [-Include <string[]>] [-PassThru] [-Confirm] [-WhatIf] [-UseTransaction] [<CommonParameters>]

DESCRIPTION
    The Rename-ItemProperty cmdlet changes the name of a specified item property. The value of the property is not changed. For example, you can use Rename-ItemProperty to change the name of a Registry entry.

PARAMETERS
    -Credential <PSCredential>
        Specifies a user account that has permission to perform this action. The default is the current user.

        Type a user name, such as “User01” or “Domain01\User01”, or enter a PSCredential object, such as one generated by the Get-Credential cmdlet. If you type a user name, you will be prompted for a password.

        This parameter is not supported by any providers installed with Windows PowerShell.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Exclude <string[]>
        Omits the specified items. Wildcards are permitted.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Filter <string>
        Specifies a filter in the provider’s format or language. The value of this parameter qualifies the Path parameter. The syntax of the filter, including the use of wildcards, depends on the provider. Filters are more efficient than other parameters, because the provider applies them when retrieving the objects rather than having Windows PowerShell filter the objects after they are retrieved.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Force [<SwitchParameter>]
        Allows the cmdlet to rename a property of an object that cannot otherwise be accessed by the user. Implementation varies from provider to provider. For more information, see about_providers.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Include <string[]>
        Specifies only those items upon which the cmdlet will act, excluding all others.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -LiteralPath <string>
        Specifies a path to the item property. The value of LiteralPath is used exactly as it is typed. No characters are interpreted as wildcards. If the path includes escape characters, enclose it in single quotation marks. Single quotation marks tell Windows PowerShell not to interpret any characters as escape sequences.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -Name <string>
        Specifies the current name of the property to be renamed.

        Required?                    true
        Position?                    2
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -NewName <string>
        Specifies the new name for the property.

        Required?                    true
        Position?                    3
        Default value
        Accept pipeline input?     true (ByPropertyName)
        Accept wildcard characters? false

    -PassThru [<SwitchParameter>]
        Returns an object representing the item property. By default, this cmdlet does not generate any output.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -Path <string>
        Specifies the path to the item to be renamed.

        Required?                    true
        Position?                    1
        Default value
        Accept pipeline input?     true (ByValue, ByPropertyName)
        Accept wildcard characters? false

    -Confirm [<SwitchParameter>]
        Prompts you for confirmation before executing the command.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -WhatIf [<SwitchParameter>]
        Describes what would happen if you executed the command without actually executing the command.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    -UseTransaction [<SwitchParameter>]
        Includes the command in the active transaction. This parameter is valid only when a transaction is in progress. For more information, see about_transactions.

        Required?                    false
        Position?                    named
        Default value
        Accept pipeline input?     false
        Accept wildcard characters? false

    <CommonParameters>
        This cmdlet supports the common parameters: Verbose, Debug,
        ErrorAction, ErrorVariable, WarningAction, WarningVariable,
        OutBuffer and OutVariable. For more information, type,
        “Get-Help about_CommonParameters“.

INPUTS
    System.String
        You can pipe a string that contains a path (but not a literal path) to Rename-ItemProperty.

OUTPUTS
    None or System.Management.Automation.PSCustomObject
        When you use the PassThru parameter, Rename-ItemProperty generates a PSCustomObject representing the renamed item property. Otherwise, this cmdlet does not generate any output.

NOTES

        The Remove-ItemProperty cmdlet is designed to work with the data exposed by any provider. To list the providers available in your session, type “Get-PSProvider“. For more information, see about_providers.

    ————————– EXAMPLE 1 ————————–

    C:\PS>Rename-Itemproperty -Path HKLM:\Software\SmpApplication -Name config -NewName oldconfig

    Description
    ———–
    This command renames the config Registry entry contained in the HKEY_LOCAL_MACHINE\Software\SmpApplication key to oldconfig.

RELATED LINKS
    Online version: http://go.microsoft.com/fwlink/?LinkID=113383
    about_providers
    Rename-Item
    Clear-ItemProperty
    Copy-ItemProperty
    Get-ItemProperty
    Move-ItemProperty
    New-ItemProperty
    Remove-ItemProperty
    Set-ItemProperty