--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dup.rst	Wed Dec 14 14:47:36 2011 +0200
@@ -0,0 +1,62 @@
+.. -*- coding: utf-8; -*-
+
+==============
+ Duplication.
+==============
+.. contents::
+
+Search for duplicate files.
+===========================
+
+This utilities only search for duplicate files:
+
+  http://code.google.com/p/fdupes/
+                fdupes home page
+  http://ru.wikipedia.org/wiki/Fdupes
+                fdupes wiki page
+  http://duff.sourceforge.net/
+                duff home page
+  http://freedup.org/
+                freedup home page
+  http://dupedit.com/
+                dupedit home page
+  http://rdfind.pauldreik.se/
+                Rdfind home page
+  http://code.google.com/p/softenido/wiki/FindRepe
+                FindRepe home page
+
+freedups.
+---------
+
+Freedups searches through the directories you specify. When it finds two
+identical files, it hard links them together. Now the two or more files still
+exist in their respective directories, but only one copy of the data is stored
+on disk; both directory entries point to the same data blocks.
+
+  http://www.stearns.org/freedups/
+                freedups home page
+
+dupmerge.
+---------
+
+Dupmerge reads a list of files from standard input (eg., as produced by "find .
+-print") and looks for identical files. When it finds two or more identical
+files, all but one are unlinked to reclaim the disk space and recreated as hard
+links to the remaining copy.
+
+  https://sourceforge.net/projects/dupmerge/
+                dupmerge home page
+  http://freecode.com/projects/dupmerge
+                dupmerge freecode page
+
+ssdeep.
+-------
+
+ssdeep is a program for computing context triggered piecewise hashes (CTPH).
+Also called fuzzy hashes, CTPH can match inputs that have homologies. Such
+inputs have sequences of identical bytes in the same order, although bytes in
+between these sequences may be different in both content and length.
+
+  http://ssdeep.sourceforge.net/
+                ssdeep home page
+