I am writing script to search for dups files and group them by size and then by their MD5 check sum.

here is my script:

find . -type f -printf "%s\n" | sort -rn | uniq -d | xargs -I{} -n1 find -type f -size {}c -print0 | xargs -0 md5sum | sort | uniq -w32 > ./dups.txt

I want to make sure my script generate my dups files by their size and MD5 Correctly.

is there anyway that I can make sure my result is correct or will you help me to check my script and let me know, please ?


Here's a similar duplicate-finding tool, in Perl, under the GPL:


You may also wish to explore the -exec option to find(1).

  • Thank you, but don't know much in perl yet :( thank you so much – user231620 Jun 16 '13 at 23:33

I recommend you to use fdupes, it's designed for this purpose.

Description :

a program for identifying or deleting duplicate files residing within specified directories

  • I can't install fdupes :( that's my problem :( – user231620 Jun 16 '13 at 22:38

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