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

     du  -  summarize disk usage

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

     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.

     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-

                              - 1 -