V8/usr/man/man1/du.1

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.TH DU 1 
.SH NAME
du \- summarize disk usage
.SH SYNOPSIS
.B du
[
.B \-s
] [
.B \-a
] [ name ... ]
.SH DESCRIPTION
.I Du
gives the number of kilobytes (kilo=1024) allocated to data blocks
of named files and of named directories including (recursively) their contents.
If
.I name
is missing,
.RB ` . '
is used.
.PP
Option
.B \-s
causes only the grand total to
be given.
Option
.B \-a
causes an entry to be generated
for each file.
Absence of either causes an entry to be generated for
each directory only.
.PP
A file which has two links to it is counted only once.
.SH SEE\ ALSO
df(1), quot(8)
.SH BUGS
In the absence of option
.B \-a
non-directories
given as arguments are not listed.
.br
If there are too many distinct linked files,
.I du
counts the excess files multiply.
.br
Unwritten holes in files count as if real data were present,
and indirect blocks are not counted.