Saves command output in a file or variable and also sends it down the pipeline.
Tee-Object [-InputObject <PSObject>] [-FilePath] <String> [-Append] [<CommonParameters>]
Tee-Object [-InputObject <PSObject>] -LiteralPath <String> [<CommonParameters>]
Tee-Object [-InputObject <PSObject>] -Variable <String> [<CommonParameters>]
The Tee-Object cmdlet redirects output, that is, it sends the output of a command in two directions (like the letter T). It stores the output in a file or variable and also sends it down the pipeline. If Tee-Object is the last command in the pipeline, the command output is displayed at the prompt.
Example 1: Output processes to a file and to the console
PS C:\>Get-Process | Tee-Object -FilePath "C:\Test1\testfile2.txt" Handles NPM(K) PM(K) WS(K) VM(M) CPU(s) Id ProcessName ------- ------ ----- ----- ----- ------ -- ----------- 83 4 2300 4520 39 0.30 4032 00THotkey 272 6 1400 3944 34 0.06 3088 alg 81 3 804 3284 21 2.45 148 ApntEx 81 4 2008 5808 38 0.75 3684 Apoint ...
This command gets a list of the processes running on the computer and sends the result to a file. Because a second path is not specified, the processes are also displayed in the console.
Example 2: Output processes to a variable and Select-Object
PS C:\>Get-Process notepad | Tee-Object -Variable proc | Select-Object processname,handles ProcessName Handles ----------- ------- notepad 43 notepad 37 notepad 38 notepad 38
This command gets a list of the processes running on the computer and sends the result to a variable named proc. It then pipes the resulting objects along to Select-Object, which selects the ProcessName and Handles property. Note that the $proc variable includes the default information returned by Get-Process.
Example 3: Output system files to two log files
PS C:\>Get-ChildItem -Path D: -File -System -Recurse | Tee-Object -FilePath "c:\test\AllSystemFiles.txt" -Append | Out-File c:\test\NewSystemFiles.txt
This command saves a list of system files in a two log files, a cumulative file and a current file.
The command uses the Get-ChildItem cmdlet to do a recursive search for system files on the D: drive. A pipeline operator (|) sends the list to Tee-Object, which appends the list to the AllSystemFiles.txt file and passes the list down the pipeline to the Out-File cmdlet, which saves the list in the NewSystemFiles.txt file.
Indicates that the cmdlet appends the output to the specified file. Without this parameter, the new content replaces any existing content in the file without warning.
This parameter was introduced in Windows PowerShell 3.0.
Type: SwitchParameter Parameter Sets: File Aliases: Required: False Position: Named Default value: None Accept pipeline input: False Accept wildcard characters: False
Specifies a file that this cmdlet saves the object to Wildcard characters are permitted, but must resolve to a single file.
Type: String Parameter Sets: File Aliases: Required: True Position: 0 Default value: None Accept pipeline input: False Accept wildcard characters: False
Specifies the object to be saved and displayed. Enter a variable that contains the objects or type a command or expression that gets the objects. You can also pipe an object to Tee-Object.
When you use the InputObject parameter with Tee-Object, instead of piping command results to Tee-Object, the InputObject value-even if the value is a collection that is the result of a command, such as
InputObject (Get-Process)-is treated as a single object.
Because InputObject cannot return individual properties from an array or collection of objects, it is recommended that if you use Tee-Object to perform operations on a collection of objects for those objects that have specific values in defined properties, you use Tee-Object in the pipeline, as shown in the examples in this topic.
Type: PSObject Parameter Sets: (All) Aliases: Required: False Position: Named Default value: None Accept pipeline input: True (ByValue) Accept wildcard characters: False
Specifies a file that this cmdlet saves the object to. Unlike FilePath, 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.
Type: String Parameter Sets: LiteralFile Aliases: PSPath Required: True Position: Named Default value: None Accept pipeline input: False Accept wildcard characters: False
Specifies a variable that the cmdlet saves the object to. Enter a variable name without the preceding dollar sign ($).
Type: String Parameter Sets: Variable Aliases: Required: True Position: Named Default value: None Accept pipeline input: False Accept wildcard characters: False
This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters (http://go.microsoft.com/fwlink/?LinkID=113216).
You can pipe objects to Tee-Object.
Tee-Object returns the object that it redirects.
- You can also use the Out-File cmdlet or the redirection operator, both of which save the output in a file but do not send it down the pipeline.
- Tee-Object uses Unicode encoding when it writes to files. As a result, the output might not be formatted properly in files with a different encoding. To specify the encoding, use the Out-File cmdlet.