.\"
.\" Sccsid @(#)du.1	1.26 (gritter) 1/24/05
.\" Parts taken from du(1), Unix 32V:
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.TH DU 1 "1/24/05" "Heirloom Toolchest" "User Commands"
.SH NAME
du \- summarize disk usage
.SH SYNOPSIS
\fBdu\fR [\fB\-arshHkLxo\fR] [\fIname\fR ...]
.SH DESCRIPTION
.I Du
gives the number of blocks (512 bytes) 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 following options are supported:
.TP
.B \-a
This option causes an entry to be generated
for each file.
Absence of either causes an entry to be generated for
each directory only.
.TP
.B \-r
Show error messages.
This is the default with
.B /usr/5bin/posix/du
and
.BR /usr/5bin/posix2001/du .
.TP
.B \-s
This option causes only the grand total to
be given.
Overrides the \-a option.
.PP
The following options have been introduced by POSIX.2:
.TP
.B \-k
Print statistics in units of 1024 bytes,
rounded up to the next unit.
.TP
.B \-x
Do not cross device boundaries
when descending a directory hierarchy.
.PP
The following options have been introduced by POSIX.1-2001:
.TP
.B \-H
Follow symbolic links given on the command line
and count the size of the files they refer to,
but do not follow symbolic links found during directory traversal
and count the sizes of these symbolic links themselves.
.TP
.B \-L
Always follow symbolic links
and count the sizes of the files they refer to.
.PP
The following options are extensions:
.TP
.B \-h
Print statistics in human-readable powers of 1024,
i.\|e. `K' for kilobyte,
`M' for megabyte,
`G' for gigabyte,
`T' for terabyte,
`P' for petabyte,
and `E' for exabyte.
.TP
.B \-o
Do not add sizes of subdirectories to parent directories.
.PP
A file which has two links to it is only counted once.
.SH "SEE ALSO"
df(1)
.SH NOTES
Non-directories
given as arguments (not under
.B \-a
or
.B \-s
options) are not listed with
.B /usr/5bin/du
and
.BR /usr/5bin/s42/du .
.PP
Files with holes may produce incorrect results.