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How to find duplicates contents in a files by comparing other files?

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Top Forums UNIX for Advanced & Expert Users How to find duplicates contents in a files by comparing other files?
# 8  
Old 07-27-2012
Try this - can be lengthy (about 100 times slower than md5sum solution). Works on linux.

Code:
for i in *; do for j in *; do if [ $i != $j ]; then diff -sq $i $j 2>/dev/null; fi; done; done|grep identical

Last edited by RudiC; 07-27-2012 at 10:22 AM.. Reason: removed diff on same filename
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LEARN ABOUT OSF1

dircmp

dircmp(1)						      General Commands Manual							 dircmp(1)

NAME

       dircmp - Compares two directories

SYNOPSIS

       dircmp [-d] [-s] directory1 directory2

       The dircmp command reads directory1 and directory2, compares their contents, and writes the results to standard output.

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       dircmp:	XCU5.0

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

OPTIONS

       Displays  for  each  common  file name the differing contents of the two files, if any.	The display format is the same as that of the diff
       command.  Does not list the names of identical files.

OPERANDS

       The path name of a directory to be compared.

DESCRIPTION

       First, dircmp compares the file names in each directory.  When the same file name appears in both, dircmp compares the contents of the  two
       files.

       In  the	output, dircmp lists the files unique to each directory.  It then lists the files with identical names but different contents.	If
       entered without a option, dircmp also lists files that have both identical names and identical contents.

NOTES

       [Tru64 UNIX]  In many cases, diff -r, rather than dircmp, is preferred.	The dircmp command is marked LEGACY.  The diff -r  command  should
       be used instead.

EXAMPLES

       To summarize the differences between the files in two directories, enter: dircmp  proj.ver1  proj.ver2

	      This  displays a summary of the differences between the directories proj.ver1 and proj.ver2.  The summary lists separately the files
	      found only in one directory or the other, and those found in both.  If the file is found in both directories, the  file  is  listed.
	      If the files are identical, dircmp displays identical; otherwise, dircmp displays different.  To show the details of the differences
	      between files, enter: dircmp  -d	-s  proj.ver1  proj.ver2

	      The -s option suppresses information about identical files. The -d option displays a diff listing for each of  the  differing  files
	      found in both directories.

SEE ALSO

       Commands:  cmp(1), diff(1)

       Standards:  standards(5)

																	 dircmp(1)