Similar to a previous cmdlet of a day we covered,
Set-Content, PowerShell also has another cmdlet called
Out-File that performs a similar feat which is write output directly to a text file.
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Unlike the general
Set-Content cmdlet that's purpose is a universal cmdlet to create or overwrite a file at any point in a script, the
Out-File PowerShell cmdlet was designed to replace the standard output redirection operator (
>). Even from the DOS days, we could redirect output to a file. This cmdlet is the PowerShell way to do it.
Basic Out-File Usage
This cmdlet is simple to use as was the standard output redirection operator before it. Its sole purpose is to send the raw output directly to a text file with no regard. There are minimal ways to tweak how that output is written.
To demonstrate, I can retrieve all of the services from a local machine which returns them to the console as you'd expect. If I redirect that output through the PowerShell pipeline to this cmdlet, you can see that same output gets written to a file instead of the console.
PS> Get-Service | Out-File -FilePath C:\Services.txt PS> Get-Content C:\Services.txt Status Name DisplayName Stopped AJRouter AllJoyn Router Service Stopped ALG Application Layer Gateway Service Stopped AppIDSvc Application Identity Stopped Appinfo Application Information Stopped AppMgmt Application Management <SNIP>
Appending with Out-File
By default, this cmdlet will overwrite a file. Think
Set-Content. However, we can also use the
Append parameter if perhaps we have some process that's collecting information as it goes along.
PS> 'foo' | Out-File -FilePath C:\File.txt PS> Get-Content -Path C:\File.txt foo PS> 'foo' | Out-File -FilePath C:\File.txt PS> Get-Content C:\File.txt foo PS> 'foo' | Out-File -FilePath C:\File.txt -Append PS> Get-Content C:\File.txt foo foo
Changing Up Out-File Output
By default, this cmdlet will attempt to replicate what's shown on the console but there are some ways to manipulate it. For example, it has a
NoNewLine parameter that merely removes all newline characters.
PS> Get-Service | Out-File -FilePath C:\Services.txt -NoNewline PS> Get-Content C:\Services.txt Status Name DisplayName ------ ---- ----------- Stopped AJRouter AllJoyn Router Service Stopped ALG Application La
Or, we can cut off the text on each row at a particular character count as well.
PS> Get-Service | Out-File -FilePath C:\Services.txt -Width 30 PS> Get-Content C:\Services.txt Status Name DisplayName Stopped AJRouter Al
In my experience, I do not find myself using this cmdlet too often. It gives you no real options to manipulate the output and forces you to massage the output to exactly how it's supposed to look before writing to the file.
Out-File is similar to a PowerShell transcript where it writes everything directly to a text file. I will always prefer either
Set-Content to write to files but if you need a quick way to get the PowerShell output to a file,
Out-File is the way to go.
For a full breakdown, check out the Microsoft documentation.
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