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Find Duplicate Files (based on size first, then MD5 hash)

Terminal - Find Duplicate Files (based on size first, then MD5 hash)
find . -type f -size +0 -printf "%-25s%p\n" | sort -n | uniq -D -w 25 | sed 's/^\w* *\(.*\)/md5sum "\1"/' | sh | sort | uniq -w32 --all-repeated=separate
2013-02-23 20:44:20
User: jimetc
Functions: find sed sh sort uniq
0
Find Duplicate Files (based on size first, then MD5 hash)

Avoids the nested 'find' commands but doesn't seem to run any faster than syssyphus's solution.

Alternatives

There are 9 alternatives - vote for the best!

Terminal - Alternatives
find -not -empty -type f -printf "%s\n" | sort -rn | uniq -d | xargs -I{} -n1 find -type f -size {}c -print0 | xargs -0 md5sum | sort | uniq -w32 --all-repeated=separate
2009-09-21 00:24:14
User: syssyphus
Functions: find md5sum sort uniq xargs
60

This dup finder saves time by comparing size first, then md5sum, it doesn't delete anything, just lists them.

find -type f -exec md5sum '{}' ';' | sort | uniq --all-repeated=separate -w 33 | cut -c 35-
2009-08-04 07:05:12
User: infinull
Functions: cut find md5sum sort uniq
18

Calculates md5 sum of files. sort (required for uniq to work). uniq based on only the hash. use cut ro remove the hash from the result.

fdupes -r .
2011-02-19 17:02:30
User: Vilemirth
Tags: xargs parallel
16

If you have the fdupes command, you'll save a lot of typing. It can do recursive searches (-r,-R) and it allows you to interactively select which of the duplicate files found you wish to keep or delete.

find -type d -name ".svn" -prune -o -not -empty -type f -printf "%s\n" | sort -rn | uniq -d | xargs -I{} -n1 find -type d -name ".svn" -prune -o -type f -size {}c -print0 | xargs -0 md5sum | sort | uniq -w32 --all-repeated=separate
2010-01-28 09:45:29
User: 2chg
Functions: find md5sum sort uniq xargs
2

Improvement of the command "Find Duplicate Files (based on size first, then MD5 hash)" when searching for duplicate files in a directory containing a subversion working copy. This way the (multiple dupicates) in the meta-information directories are ignored.

Can easily be adopted for other VCS as well. For CVS i.e. change ".svn" into ".csv":

find -type d -name ".csv" -prune -o -not -empty -type f -printf "%s\n" | sort -rn | uniq -d | xargs -I{} -n1 find -type d -name ".csv" -prune -o -type f -size {}c -print0 | xargs -0 md5sum | sort | uniq -w32 --all-repeated=separate
find -not -empty -type f -printf "%-30s'\t\"%h/%f\"\n" | sort -rn -t$'\t' | uniq -w30 -D | cut -f 2 -d $'\t' | xargs md5sum | sort | uniq -w32 --all-repeated=separate
2014-10-19 02:00:55
User: fobos3
Functions: cut find md5sum sort uniq xargs
1

Finds duplicates based on MD5 sum. Compares only files with the same size. Performance improvements on:

find -not -empty -type f -printf "%s\n" | sort -rn | uniq -d | xargs -I{} -n1 find -type f -size {}c -print0 | xargs -0 md5sum | sort | uniq -w32 --all-repeated=separate

The new version takes around 3 seconds where the old version took around 17 minutes. The bottle neck in the old command was the second find. It searches for the files with the specified file size. The new version keeps the file path and size from the beginning.

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