How can I remove duplicate files across separate directory trees?

How can I remove duplicate files across separate directory trees? I have two directories: old/ and new/. Some of the files in old/ are duplicates of those in new/. Some merely have the same name, and a few may even have identical content but different names. I'm not interested in the subdirectory path to the files, so only an unqualified filename needs to be considered in the matching.
Asked by: Guest \| Views: 228

Total answers/comments: 1

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bert [Entry]

"Of course! Check out FSlint:

FSlint is a utility to find and clean
various forms of lint on a filesystem.
I.E. unwanted or problematic cruft in
your files or file names. For example,
one form of lint it finds is duplicate
files. It has both GUI and command
line modes.

FSlint is free and open source software."