Find duplicate images

[ency]

Hello

i have a lot of images stored on an USB HDD. A big amount of these images are duplicates. How can i find those duplicates on command line?
How can i sort them by "Date Taken" in new folders?

[Phil Harvey]

There are various utilities for finding duplicate files.  ExifTool doesn't have that functionality.

To sort files into directories by date taken, see here.  (specifically, example 12)

- Phil