


      DU(1)                       (UNIX 5.0)                      DU(1)



      NAME
           du - summarize disk usage

      SYNTAX
           du [ -ars ] [ names ]

      DESCRIPTION
           Du gives the number of blocks contained in all files and
           (recursively) directories within each directory and file
           specified by the names argument.  If names is missing, . is
           used.  The block count is the number of 1024-byte blocks.
           The extra 4096-byte page taken by a multiple extent file is
           not included in the block count.

           The optional argument -s causes only the grand total (for
           each of the specified names) to be given.  The optional
           argument -a causes an entry to be generated for each file.
           Absence of either causes an entry to be generated for each
           directory only.

           Du is normally silent about directories that cannot be read,
           files that cannot be opened, etc.  The -r option will cause
           du to generate messages in such instances.

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

      BUGS
           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 count
           the excess files more than once.
























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