FDUPES是一个程序，用于识别和删除重复的文件位于指定的目录内。

Usage  --------------------------------------------------------------------  Usage: fdupes [options] DIRECTORY...     -r --recurse      for every directory given follow subdirectories                     encountered within   -R --recurse:     for each directory given after this option follow                     subdirectories encountered within   -s --symlinks     follow symlinks   -H --hardlinks    normally, when two or more files point to the same                     disk area they are treated as non-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 and delete all                     others; important: under particular circumstances,                     data may be lost when using this option together                     with -s or --symlinks, or when specifying a                     particular directory more than once; refer to the                     fdupes documentation for additional information   -v --version      display fdupes version   -h --help         display this help message

项目主页：http://www.open-open.com/lib/view/home/1409626584432