    DU(I)                        1/20/73                        DU(I)

    NAME
         du  -  summarize disk usage

    SYNOPSIS
         du [ -s ] [ -a ] [ name ... ]

    DESCRIPTION
         Du  gives  the  number  of blocks contained in all files and
         (recursively) directories within each specified directory or
         file name.  If name is missing, `.'  is used.

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

         A file which has two links to it is only counted once.

    BUGS
         Non-directories given as arguments (not under -a option) are
         not listed.

         Removable file systems do not work correctly since i-numbers
         may be repeated while the corresponding files are  distinct.
         Du  should  maintain an i-number list per root directory en-
         countered.

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