fdupes - finds duplicate files in a given set of directories

       Adrian Lopez <adrianlopezroche@gmail.com>

                                                                                                       FDUPES(1)

       When using -d or --delete, care should be taken to insure against accidental data loss.

       When used together with options -s or --symlink, a user  could  accidentally  preserve  a  symlink  while
       deleting the file it points to.

       Furthermore,  when specifying a particular directory more than once, all files within that directory will
       be listed as their own duplicates, leading to data loss  should  a  user  preserve  a  file  without  its
       "duplicate" (the file itself!).

       Searches  the  given  path  for  duplicate  files.  Such  files are found by comparing file sizes and MD5
       signatures, followed by a byte-by-byte comparison.

fdupesa--recurse:b
              Will follow subdirectories under b, but not those under a.

       fdupesa--recurseb
              Will follow subdirectories under both a and b.

       fdupes - finds duplicate files in a given set of directories

       Unless -1 or --sameline is specified, duplicate files are listed together in groups, each file  displayed
       on a separate line. The groups are then separated from each other by blank lines.

       When  -1  or  --sameline  is  specified, spaces and backslash characters  (\) appearing in a filename are
       preceded by a backslash character.

-r--recurse
              For every directory given follow subdirectories encountered within.

       -R--recurse:
              For each directory given after this option follow subdirectories encountered within (note the  ':'
              at the end of option; see the Examples section below for further explanation).

       -s--symlinks
              Follow symlinked directories.

       -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.

       -G--minsize=SIZE
              Consider only files greater than or equal to SIZE in bytes.

       -L--maxsize=SIZE
              Consider only files less than or equal to SIZE in bytes.

       -c--cache
              Speed up file comparisons  by  keeping  track  of  their  signatures  in  a  database;  additional
              parameters  may  be  provided using one or more cache parameters (as indicated below). Please note
              that this option may not be available on some systems.

       -xcache.OPTION
              Supply an optional cache parameter, where OPTION is one of the keywords below and multiple options
              may be supplied via successive -x arguments:

                readonly
                  read but do not update file signatures

                prune
                  look through entire cache and delete orphaned entries

                clear
                  clear all entries from cache

                vacuum
                  reduce size of DB file, if possible

              The options prune, clear, and vacuum may be employed without supplying a DIRECTORY  argument,  and
              will  take  effect  even  if  readonly is also specified. The order of operations is always clear,
              prune, update signatures (unless readonly), and vacuum.

       -n--noempty
              Exclude zero-length files from consideration.

       -A--nohidden
              Exclude hidden 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.

       -t--time
              Show modification time of duplicate files.

       -m--summarize
              Summarize duplicate file information.

       -q--quiet
              Hide progress indicator.

       -d--delete
              Prompt user for files to preserve, deleting all others (see CAVEATS below).

       -D--deferconfirmation
              In interactive mode, defer  byte-for-byte  confirmation  of  duplicates  until  just  before  file
              deletion.

       -P--plain
              With  --delete,  use  a  line-based  prompt  (as with older versions of fdupes) instead of the new
              screen-mode interface. On installations where the screen-mode interface is not  supported,  fdupes
              will default to a line-based prompt.

       -N--noprompt
              When used together with --delete, preserve the first file in each set of duplicates and delete the
              others without prompting the user.

       -I--immediate
              Delete duplicates as they are encountered, without grouping into sets; implies --noprompt.

       -p--permissions
              Don't consider files with different owner/group or permission bits as duplicates.

       -o--order=WORD
              Order  files  according  to  WORD: time - sort by modification time, ctime - sort by status change
              time, name - sort by filename.

       -i--reverse
              Reverse order while sorting.

       -l--log=LOGFILE
              Log file deletion choices to LOGFILE.

       -v--version
              Display fdupes version.

       -h--help
              Display help.

fdupes [ options ] DIRECTORY ...