There are a number of commands in PowerShell that aren't as "quiet" as you may want them to be. Sometimes, there are parameters to supress output, but not always. Fortunately, we have Out-Null. While seemingly simple, this is a priceless cmdlet. I use it when writing scripts to keep the output clean.
Perhaps the simplest explanation of this cmdlet is to show a very common function, md, which creates a new directory. For the uninitiated, this function is available to support backwards-compatibility to DOS. You may have caught that I referred to this as a function and not an alias to a cmdlet. Based on that, if you want to see what the function is, simply use Get-Content.
PS C:\Flanakin> Get-Content function:md
param([string]$paths); New-Item -type directory -path $paths
As you can see, md simply makes a call to New-Item and tells it to create a directory with the specified path. Pretty simple. Here's what the output looks like.
PS C:\Flanakin> md noisy
Mode LastWriteTime Length Name
---- ------------- ------ ----
d---- 1/27/2009 2:51 PM noisy
I don't know about you, but that's a lot more than I really care to know. Oh, and note the 6 extra lines. Bleh! Luckily, Out-Null will save us.
PS C:\Flanakin> md quiet | Out-Null
That's it! You gotta love something so simple.