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Batch renaming files in Windows.

I don’t do any development work on Windows. When a collaborator asked me how to rename a bunch of files on Windows, I didn’t know how to do it.

Thankfully, there’s an easy way with the command line – source is windows-commandline.com.

I was mostly interested in adding a prefix. Here, all of the .jpg files in a directory and its subdirectories are renamed, with a prefix added to the filename of 03-21.

forfiles /S /M *.jpg /C "cmd /c rename @file 03-21-@file"

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