du(1)                            DG/UX 5.4.2                           du(1)


NAME
       du - summarize disk usage

SYNOPSIS
       du [ -amrs ] [ name ... ]

   where:
       name   The name of a directory or regular file; default = .

DESCRIPTION
       Du gives the number of blocks contained in all files and
       (recursively) directories within each directory and file specified by
       the name argument.  The block count includes the indirect blocks of
       the file.

       A file with two or more links is counted only once.

       Options are:

       -a     Generate an entry for each file.

       -m     Traverse only those subdirectories that are within the same
              file system (i.e., don't cross file system mount points).
              Normally, du traverses all subdirectories within each
              directory when calculating disk usage.

       -r     Generate a message for each directory that cannot be read,
              each file that cannot be opened, etc.  By default du is silent
              in such instances.

       -s     Give only the grand total for each of the specified
              directories.  Absence of either -a or -s generates an entry
              for each directory only.

EXAMPLES
       du | egrep '^[1-9][0-9][0-9]+'

       Displays the directories and sub-directories which have a larger
       block count than 100.  The output of du is piped to egrep, and egrep
       searches for strings that start with the number 100 or greater.

SEE ALSO
       df(1M).

NOTES
       If the -a option is not used, non-directories given as arguments are
       not listed.
       If there are too many distinct linked files, du will abort.
       Files with holes in them will get an incorrect block count.








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