FDUPES 介绍
FDUPES 是一个文件去重工具，可在指定的文件夹中标识出重复的文件。
使用方法：
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