duff
Duplicate file finder. tldr-pages
On Linux
Linux
Find duplicate files recursively
duff -r path/to/directoryIdentifyList all but one file from each cluster of duplicates
duff -er path/to/directoryIdentifyList unique files
duff -ur path/to/directoryIdentifyUse SHA-256 instead of SHA-1
duff -d sha256 path/to/directoryIdentifyCompare files byte by byte instead of using digests
duff -t path/to/directoryIdentifyInclude hidden files and directories when searching recursively
duff -ar path/to/directoryIdentify