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????cd /usr/share/fslint/fslint
????./fslint /path/to/directory
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$ /usr/share/fslint/fslint/findup --help
find dUPlicate files.
Usage: findup [[[-t [-m|-d]] | [--summary]] [-r] [-f] paths(s) ...]
If no path(s) specified then the current directory is assumed.
When -m is specified any found duplicates will be merged (using hardlinks).
When -d is specified any found duplicates will be deleted (leaving just 1).
When -t is specfied?? only report what -m or -d would do.
When --summary is specified change output format to include file sizes.
You can also pipe this summary format to /usr/share/fslint/fslint/fstool/dupwaste
to get a total of the wastage due to duplicates.