"sif" for finding all similar files in a large file system

[kuni.suzaki]

Hello,

I am not sure it is suitable to ask this question here, but I guess
the subscriber will be interested in.
I am looking for the tool called "sif" for finding all similar files
in a large file system.
The technical detail is presented in USENIX 94 Winter.
Udi Manber, inding similar files in a large file system,
http://portal.acm.org/citation.cfm?id=1267076

I want to use the "sif" to find similar files all-against-all.
Please tell me if I can use "sif" or similar tools.

I found a similar tool called "Anit-Twin" but it works on Windows with
GUI.
http://www.anti-twin.com/

I want to a tool on Linux to integrate into my scripting program.

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Kuni Suzaki