The fdupes command finds duplicate files in a given set of directories.
# Requires Mac Ports and fdupes port.
# Install fdupes port:
# $> sudo port install fdupes
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# How Do I Use fdupes?
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# Find duplicate files in /etc/ directory, enter:
fdupes /etc
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# How Do I Delete Unwanted Files?
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# You can force fdupes to prompt you for files to preserve,
# deleting all others (use this with care otherwise you may loss data):
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fdupes -d /etc
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# How Do Recursively Search Directory?
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# You can recursively search every directory given follow subdirectories
# encountered within the -r option, enter:
fdupes -r /dir1
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# How Do I Find Dupes In Two Directories?
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# Type the command as follows:
fdupes /dir1 /dir2
# OR
fdupes -r /etc /data/etc /nas95/etc
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# How Do I See Size Of Duplicate Files?
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# Type the following command with the -S option:
fdupes -S /etc