SlackBuildsOrg/system/ssdeep
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ssdeep.info
ssdeep.SlackBuild

ssdeep computes a checksum based on context triggered piecewise
hashes (fuzzy hashes) for each input file.  If requested, the program
matches those checksums against a file of known checksums and reports
any possible matches.  It can also examine one or more of signatures
and find any matches in those signatures.