du.1

unix v7是最后一个广泛发布的研究型UNIX版本

.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 blocks contained in all files
and (recursively) directories within each specified directory or
file
.IR name .
If
.I name
is missing,
`\fB.\fR'
is used.
.PP
The optional argument
.B \-s
causes only the grand total to
be given.
The optional argument
.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 only counted once.
.SH BUGS
Non-directories
given as arguments (not under
.B \-a
option) are not listed.
.br
If there are too many distinct linked files,
.I du
counts the excess files multiply.