Find characters and rename file name using Powershell

powershell file-rename

Here's an example to rename all pdf files in the current directory, removing all leading numbers or underscores from the file name:

Get-ChildItem -Filter *.pdf | Rename-Item -NewName {$_.Name -replace '^[0-9_]+'}

powershell file-rename

Here's another method that doesn't rely on regex but assumes no underscores in the filepath:

Get-ChildItem 'C:\path2files' | %{    Rename-Item $_.fullname $_.Name.Split("_")[2]    }

powershell file-rename

Given a string like "1050_14447_Letter Extension.pdf", here is one way:

$foo = "1050_14447_Letter Extension.pdf"$foo -replace '^.*_.*_(.*)$', '$1'

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