dupdump Finds duplicated dirs/files on a list of directories. Outputs a parsable list from where you can delete (after careful inspection) the dir/file from the right side.
Fedora installation: rpm -Uhv http://kernel.embedromix.ro/dinorepo-0.0.9-1.noarch.rpm && yum -y install dupdump
Git tree: http://kernel.embedromix.ro/us/dupdump/dupdump.git
Language is C.
License is GPLv3.
RPM source (0.5)
dupdump-0.5.tar.gz README
Changelog
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LICENSE