Find Duplicate Files (based on MD5 hash) -- For Mac OS X

find . -type f -exec md5 '{}' ';' | sort | uniq -f 3 -d | sed -e "s/.*(\(.*\)).*/\1/"
This works on Mac OS X using the `md5` command instead of `md5sum`, which works similarly, but has a different output format. Note that this only prints the name of the duplicates, not the original file. This is handy because you can add `| xargs rm` to the end of the command to delete all the duplicates while leaving the original.

2
2012-01-14 08:54:12

10 Alternatives + Submit Alt

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


    81
    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
    grokskookum · 2009-09-21 00:24:14 49
  • 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.


    23
    fdupes -r .
    Vilemirth · 2011-02-19 17:02:30 6
  • 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.


    18
    find -type f -exec md5sum '{}' ';' | sort | uniq --all-repeated=separate -w 33 | cut -c 35-
    infinull · 2009-08-04 07:05:12 3
  • 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 Show Sample Output


    2
    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
    2chg · 2010-01-28 09:45:29 3
  • 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.


    2
    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
    fobos3 · 2014-10-19 02:00:55 7

What Others Think

I'm running OS X (10.6.8) and this command doesn't work for me. Does not return results when there are known duplicates. Changing it to find . -type f -exec md5 '{}' ';' | sort -k 4| uniq -f 3 -d | sed -e "s/.*(\(.*\)).*/\1/" does return results though.
fukr · 576 weeks ago
Oh wait, there are no md5 command in gnu/linux
chars19 · 554 weeks and 2 days ago
sorry, i dont see "for Mac OS X"
chars19 · 554 weeks and 2 days ago
Unfortunately this doesn't work if the filename has spaces in, the uniq -f 3 -d then starts comparing partial filenames instead of the MD5.
obzbdc · 396 weeks and 4 days ago
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