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-.\" 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. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. 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 April 1, 1994
-.Dt DU 1
-.Os
-.Sh NAME
-.Nm du
-.Nd display disk usage statistics
-.Sh SYNOPSIS
-.Nm du
-.Op Fl H | Fl L | Fl P
-.Op Fl a | Fl s
-.Op Fl x
-.Op Ar file ...
-.Sh DESCRIPTION
-The
-.Nm du
-utility displays the file system block usage for each file argument
-and for each directory in the file hierarchy rooted in each directory
-argument.
-If no file is specified, the block usage of the hierarchy rooted in
-the current directory is displayed.
-The number of blocks are in the same units as that returned by the
-.Xr stat 2
-system call, i.e. 512-byte blocks.
-Partial numbers of blocks are rounded up.
-.Pp
-The options are as follows:
-.Bl -tag -width Ds
-.It Fl H
-Symbolic links on the command line are followed.
-(Symbolic links encountered in the tree traversal are not followed.)
-.It Fl L
-All symbolic links are followed.
-.It Fl P
-No symbolic links are followed.
-.It Fl a
-Display an entry for each file in the file hierarchy.
-.It Fl s
-Display only the grand total for the specified files.
-.It Fl x
-Filesystem mount points are not traversed.
-.El
-.Pp
-.Nm Du
-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 du
-execution.
-.Sh ENVIRONMENTAL VARIABLES
-.Bl -tag -width BLOCKSIZE
-.It Ev BLOCKSIZE
-If the environmental variable
-.Ev BLOCKSIZE
-is set, the block counts will be displayed in units of that size block.
-.El
-.Sh SEE ALSO
-.Xr df 1 ,
-.Xr fts 3 ,
-.Xr symlink 7 ,
-.Xr quot 8
-.Sh HISTORY
-A
-.Nm du
-command appeared in
-.At v6 .