bsd man page for du

DU(1)							      General Commands Manual							     DU(1)

NAME
       du - summarize disk usage

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

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

       The argument -s causes only the grand total to be given.  The 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.

SEE ALSO
       df(1), quot(8)

BUGS
       Non-directories given as arguments (not under -a option) are not listed.
       If there are too many distinct linked files, du counts the excess files multiply.

7th Edition							  April 29, 1985							     DU(1)