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

     generated 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