batch file rename by PowerShell

1. remove some text on file name of all files: e.g. “TVBOXNOW ”

ls | Rename-Item -NewName { $_.name -replace "TVBOXNOW ", "" }

2. move up one level of files in each directory, e.g. c:\folder1\folder2\file3 to c:\folder1\file3

$files = Get-ChildItem -Recurse "c:\folder1" | where {$_.PSIScontainer -eq $false}
foreach ($file in $files)
{
	$destinationFolder = Split-Path -Parent $file.Directory.FullName
	move-item $file.FullName $destinationFolder
}

3. Remove files by extension for all subdirectories: e.g. .url / .nfo

Get-ChildItem -File -Include *.url,*.nfo -Recurse | foreach ($_) {Remove-Item $_.FullName}

4. see unique file extension in all subdirectories

Get-Childitem -File -Recurse | Select-Object Extension -Unique

5. file name format: xxxx.2013.zzzz, strip out .zzzz.  “-WhatIf” for dry run

Get-ChildItem | ForEach-Object -Process { Rename-Item -Path $_.Name -NewName ($_.name -replace '(.*)(\d{4})(.*)$', '$1$2') -WhatIf }

6.  for all pdf or epub file, rename filename as folder name

Get-ChildItem -Recurse | Where-Object { $_.Extension -eq ".pdf" -or $_.Extension -eq ".epub" -and !$_.Name.StartsWith($_.Directory.Name) } |
  rename-item -newname {$_.Directory.Name + $_.Extension } -WhatIf