du(1)                                                       du(1)



     NAME
          du - summarize disk usage

     SYNOPSIS
          du [-a] [-r] [-s] [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.  The default system size
          for physical blocks is 512 bytes.  The block count includes
          the indirect blocks of the file.  If names is missing, . is
          used.

          The optional argument -s causes only the grand total (for
          each of the specified names) to be given.  The optional ar-
          gument -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 flag option will
          cause du to generate messages in such instances.

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

     EXAMPLES
               du dir1 dir2

          produces a count of the number of (512-byte) blocks in each
          of the directories.  In order to see how many blocks are in
          each file, the -a flag option must be used.

     FILES
          /bin/du

     SEE ALSO
          df(1).

     BUGS
          If the -a flag option is not used, nondirectories given as
          arguments are not listed.
          If there are too many distinct linked files, du will count
          the excess files more than once.
          Files with holes in them will get an incorrect block count.










     April, 1990                                                     1