cde dupes
List duplicate files in all loaded catalogs.
cde dupes
It takes no options.
cde dupes does no hashing. It compares the hashes that are already in the catalogs, so it is fast. If no hashing has been done, it finds no duplicates. Run cde hash first.
cde hash
cde dupes
caution
cde dupes does not look at the file system. If files changed after the last cde hash, the report may not be useful. Hash again before you act on it.