Redirection operators

In Chapter 4, Working with Objects in PowerShell, we started exploring the different output streams PowerShell utilizes.

Information from a command may be redirected using the redirection operator >. Information may be sent to another stream or a file.

For example, the output from a command can be directed to a file. The file will contain the output as it would have been displayed in the console:

PS> Get-Process -Id $pid > process.txt
Get-Content process.txt 

Handles NPM(K)  PM(K)  WS(K) CPU(s)    Id SI  ProcessName 
------- ------  -----  ----- ------    -- --  ----------- 
    731     57 132264 133156   1.81 11624  1  powershell_ise

Each of the streams in PowerShell has a number associated with it. These are shown in the following table:

Stream name	Stream number
Standard out	1
Error	2
Warning	3
Verbose	4
Debug	5
Information	6

Note

About Write-Host:Before PowerShell 5, the output written using the Write-Host command could not be captured, redirected, or assigned to a variable...

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