How can I bulk rename files in PowerShell?

Question

I\'m trying to do the following:

Rename-Item c:\\misc\\*.xml *.tmp

I basically want to change the extension on every files within a directory t

Answer 1

dir -Recurse | where-object -FilterScript {$_.Extension -eq ".xml"} | Rename-Item -NewName {[System.IO.Path]::GetFileNameWithoutExtension($_.fullname) + ".tmp"}

use -WhatIf to evaluate the result first