How to Find duplicate copies of files Using fdupes in Ubuntu
Posted by admin on October 10th, 2008 
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Install fdupes in ubuntu
sudo aptitude install fdupes
This will install all the required packages for fdupes
Using fdupes
Fdupes syntax
fdupes [ options ] DIRECTORY
Available Options
-r --recurse - include files residing in subdirectories
-s --symlinks - follow symlinked directories
-H --hardlinks - normally, when two or more files point to the same disk area they are treated as nonn-duplicates; this option will change this behavior
-n --noempty - exclude zero-length files from consideration
-f --omitfirst - omit the first file in each set of matches
-1 --sameline - list each set of matches on a single line
-S --size - show size of duplicate files
-q --quiet - hide progress indicator
-d --delete - prompt user for files to preserve, deleting all others
-v --version - display fdupes version
-h --help - displays help
Fdupes Examples
1) fdupes -r ./stuff > dupes.txt
Then, deleting the duplicates was as easy as checking dupes.txt and deleting the offending directories. fdupes also can prompt you to delete the duplicates as you go along.
2) fdupes -r /home/user > /home/user/duplicate.txt
Output of the command goes in duplicate.txt
fdupes will compare the size and MD5 hash of the files to find duplicates
You can also use fslint to do this job this is simple GUI tool to do this.
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