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.\" $OpenBSD: du.1,v 1.39 2022/09/07 00:46:20 jsg Exp $
.\" $NetBSD: du.1,v 1.6 1996/10/18 07:20:31 thorpej Exp $
.\"
.\" Copyright (c) 1990, 1993
.\" The Regents of the University of California. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)du.1 8.2 (Berkeley) 4/1/94
.\"
.Dd $Mdocdate: September 7 2022 $
.Dt DU 1
.Os
.Sh NAME
.Nm du
.Nd display disk usage statistics
.Sh SYNOPSIS
.Nm du
.Op Fl achkrsx
.Op Fl H | L | P
.Op Fl d Ar depth
.Op Ar
.Sh DESCRIPTION
The
.Nm
utility displays the file system block usage for each
.Ar file
argument
and for each directory in the file hierarchy rooted in each directory
argument.
Note that the system block usage is usually greater than
the actual size of the file.
If no file is specified, the block usage of the hierarchy rooted in
the current directory is displayed.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl a
Display entries for files in addition to entries for directories.
.It Fl c
Display the grand total after all the arguments have been processed.
.It Fl d Ar depth
Do not display entries for files and directories more than
.Ar depth
levels deep;
.Fl d Cm 0
has the same effect as
.Fl s .
Overrides earlier
.Fl d
and
.Fl s
options.
.It Fl H
Symbolic links on the command line are followed.
Symbolic links encountered in the tree traversal are not followed.
.It Fl h
"Human-readable" output.
Use unit suffixes: Byte, Kilobyte, Megabyte,
Gigabyte, Terabyte, Petabyte, Exabyte in order to reduce the number of
digits to four or less.
.It Fl k
By default, all sizes are reported in 512-byte block counts.
The
.Fl k
option causes the numbers to be reported in kilobyte counts.
.It Fl L
All symbolic links are followed.
.It Fl P
No symbolic links are followed.
.It Fl r
Generate messages about directories that cannot be read, files
that cannot be opened, and so on.
This is the default.
.It Fl s
Display only the total for each of the specified files and directories.
Overrides earlier
.Fl d
options.
.It Fl x
File system mount points are not traversed.
.El
.Pp
It is not an error to specify more than one of
the mutually exclusive options
.Fl h
and
.Fl k .
Where more than one of these options is specified,
the last option given overrides the others.
.Pp
.Nm
counts the storage used by symbolic links and not the files they
reference unless the
.Fl H
or
.Fl L
option is specified.
If either the
.Fl H
or
.Fl L
options are specified, storage used by any symbolic links which are
followed is not counted or displayed.
The
.Fl H ,
.Fl L ,
and
.Fl P
options override each other and the command's actions are determined
by the last one specified.
.Pp
Files having multiple hard links are counted (and displayed) a single
time per
.Nm
execution.
.Sh ENVIRONMENT
.Bl -tag -width BLOCKSIZE
.It Ev BLOCKSIZE
Block counts will be displayed in units of this size block, unless the
.Fl k
or
.Fl h
option is specified.
.El
.Sh EXIT STATUS
.Ex -std du
.Sh EXAMPLES
Display a summary of files and folders in the current directory,
sorted by size:
.Pp
.Dl $ du -had 1 | sort -h
.Sh SEE ALSO
.Xr df 1 ,
.Xr fts_open 3 ,
.Xr symlink 7 ,
.Xr quot 8
.Sh STANDARDS
The
.Nm
utility is compliant with the
.St -p1003.1-2008
specification.
.Pp
The flags
.Op Fl cdhP ,
as well as the
.Ev BLOCKSIZE
environment variable,
are extensions to that specification.
.Pp
The flag
.Op Fl r
is accepted but ignored, for compatibility with systems implementing
the obsolete
.St -xcu5
standard.
.Sh HISTORY
The
.Nm
utility first appeared in
.At v1 .
.Sh AUTHORS
.An -nosplit
This version of
.Nm
was written by
.An Chris Newcomb
for
.Bx 4.3 Reno
in 1989 and incorporates later contributions from
.An Elan Amir ,
.An Keith Bostic ,
.An Luke Mewburn ,
.An Matt Bing ,
and
.An Can Erkin Acar Aq Mt canacar@openbsd.org .
|
