du(1)

NAME
     du - print disk usage

SYNOPSIS
     du [-as] [-l n] dir ...

OPTIONS

     -a   Give usage for all files

     -l   List up to n levels of subdirectories

     -d   Do not cross file system boundaries

     -s   Summary only

EXAMPLES

     du dir              # List disk space used by files in dir

     du -s dir1 dir2     # Give summaries only

     du -d /             # Show only the root device

DESCRIPTION

     Du examines one or more  directories  and  prints  the  amount  of  space
     occupied by the files in those directories and their subdirectories.

SEE ALSO
     df(1).