1.\" Copyright (c) 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)du.1 8.2 (Berkeley) 4/1/94 29.\" $FreeBSD: src/usr.bin/du/du.1,v 1.15.2.9 2003/02/24 22:37:41 trhodes Exp $ 30.\" $DragonFly: src/usr.bin/du/du.1,v 1.2 2003/06/17 04:29:26 dillon Exp $ 31.\" 32.Dd April 1, 1994 33.Dt DU 1 34.Os 35.Sh NAME 36.Nm du 37.Nd display disk usage statistics 38.Sh SYNOPSIS 39.Nm 40.Op Fl H | L | P 41.Op Fl I Ar mask 42.Op Fl a | s | d Ar depth 43.Op Fl c 44.Op Fl h | k 45.Op Fl x 46.Op Fl t 47.Op Ar 48.Sh DESCRIPTION 49The 50.Nm 51utility displays the file system block usage for each file argument 52and for each directory in the file hierarchy rooted in each directory 53argument. 54If no file is specified, the block usage of the hierarchy rooted in 55the current directory is displayed. 56If the 57.Fl k 58flag is specified, the number of 1024-byte 59blocks used by the file is displayed, otherwise 60.Xr getbsize 3 61is used to determine the preferred block size. 62Partial numbers of blocks are rounded up. 63.Pp 64The options are as follows: 65.Bl -tag -width indent 66.It Fl H 67Symbolic links on the command line are followed, symbolic links in file 68hierarchies are not followed. 69.It Fl L 70Symbolic links on the command line and in file hierarchies are followed. 71.It Fl I Ar mask 72Ignore files and directories matching the specified 73.Ar mask . 74.It Fl P 75No symbolic links are followed. 76This is the default. 77.It Fl a 78Display an entry for each file in a file hierarchy. 79.It Fl h 80"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, 81Gigabyte, Terabyte and Petabyte 82.It Fl r 83Generate messages about directories that cannot be read, files 84that cannot be opened, and so on. This is the default case. 85This option exists solely for conformance with 86.St -xpg4 . 87.It Fl s 88Display an entry for each specified file. 89(Equivalent to 90.Fl d Li 0 ) 91.It Fl t 92Calculate the apparent size based on the file size (st_size) instead 93of the actual media space used based on st_blkcnt. This is meant to 94give the caller an idea of how much data is present in actual transmittable 95bytes if it were to be copied or sent elsewhere. 96.Pp 97To make this calculation 98.Nm 99uses st_size and assumes a media blocking granularity of 512 bytes. 100Any holes present in the file are counted as transmittable data. 101.It Fl d Ar depth 102Display an entry for all files and directories 103.Ar depth 104directories deep. 105.It Fl c 106Display a grand total. 107.It Fl k 108Display block counts in 1024-byte (1-Kbyte) blocks. 109.It Fl x 110File system mount points are not traversed. 111.El 112.Pp 113The 114.Nm 115utility counts the storage used by symbolic links and not the files they 116reference unless the 117.Fl H 118or 119.Fl L 120option is specified. 121If either the 122.Fl H 123or 124.Fl L 125options are specified, storage used by any symbolic links which are 126followed is not counted or displayed. 127.Pp 128Files having multiple hard links are counted (and displayed) a single 129time per 130.Nm 131execution. 132.Sh ENVIRONMENT 133.Bl -tag -width BLOCKSIZE 134.It Ev BLOCKSIZE 135If the environment variable 136.Ev BLOCKSIZE 137is set, and the 138.Fl k 139option is not specified, the block counts will be displayed in units of that 140size block. 141If 142.Ev BLOCKSIZE 143is not set, and the 144.Fl k 145option is not specified, the block counts will be displayed in 512-byte blocks. 146.El 147.Sh SEE ALSO 148.Xr df 1 , 149.Xr fts 3 , 150.Xr symlink 7 , 151.Xr quot 8 152.Sh HISTORY 153A 154.Nm 155command appeared in 156.At v1 . 157