Best way to deal with thousands of duplicates??

tntc

Due to upload script issues, I've uploaded a few thousand duplicates over the last week. (Sorry for the bandwidth smugmug!) They've been scattered to various Galleries that also have non-duplicated photos.

What's the best way to clean this up? The tool smugline (https://github.com/gingerlime/smugline) says it can 'clear_duplicates', but smugline's documentation calls itself "young and experimental". Any other tools? Webpage techniques?

Is there anyway to delete all uploads from the last N days?? (via tool or webpage)

Other ideas?

Once I fix this...
Any recommended linux command line tools for

• uploading while checking for dupes (smugline says it will do this too), or
• keeping galleries and local directories in sync?

Thanks,
tntc