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.\" 4. 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.\" $FreeBSD$ 30.\" 31.Dd December 17, 2011 32.Dt DU 1 33.Os 34.Sh NAME 35.Nm du 36.Nd display disk usage statistics 37.Sh SYNOPSIS 38.Nm 39.Op Fl Aclnx 40.Op Fl H | L | P 41.Op Fl h | k | m 42.Op Fl a | s | d Ar depth 43.Op Fl B Ar blocksize 44.Op Fl I Ar mask 45.Op Fl t Ar threshold 46.Op Ar 47.Sh DESCRIPTION 48The 49.Nm 50utility displays the file system block usage for each file argument 51and for each directory in the file hierarchy rooted in each directory 52argument. 53If no file is specified, the block usage of the hierarchy rooted in 54the current directory is displayed. 55.Pp 56The options are as follows: 57.Bl -tag -width indent 58.It Fl A 59Display the apparent size instead of the disk usage. 60This can be helpful when operating on compressed volumes or sparse files. 61.It Fl B Ar blocksize 62Calculate block counts in 63.Ar blocksize 64byte blocks. 65This is different from the 66.Fl h, k 67and 68.Fl m 69options or setting 70.Ev BLOCKSIZE 71and gives an estimate of how much space the examined file hierarchy would 72require on a filesystem with the given 73.Ar blocksize . 74Unless in 75.Fl A 76mode, 77.Ar blocksize 78is rounded up to the next multiple of 512. 79.It Fl H 80Symbolic links on the command line are followed, symbolic links in file 81hierarchies are not followed. 82.It Fl I Ar mask 83Ignore files and directories matching the specified 84.Ar mask . 85.It Fl L 86Symbolic links on the command line and in file hierarchies are followed. 87.It Fl P 88No symbolic links are followed. 89This is the default. 90.It Fl a 91Display an entry for each file in a file hierarchy. 92.It Fl c 93Display a grand total. 94.It Fl d Ar depth 95Display an entry for all files and directories 96.Ar depth 97directories deep. 98.It Fl h 99.Dq Human-readable 100output. 101Use unit suffixes: Byte, Kilobyte, Megabyte, 102Gigabyte, Terabyte and Petabyte. 103.It Fl k 104Display block counts in 1024-byte (1-Kbyte) blocks. 105.It Fl l 106If a file has multiple hard links, count its size multiple times. 107The default behavior of 108.Nm 109is to count files with multiple hard links only once. 110When the 111.Fl l 112option is specified, the hard link checks are disabled, and these files 113are counted (and displayed) as many times as they are found. 114.It Fl m 115Display block counts in 1048576-byte (1-Mbyte) blocks. 116.It Fl n 117Ignore files and directories with user 118.Dq nodump 119flag 120.Pq Dv UF_NODUMP 121set. 122.It Fl r 123Generate messages about directories that cannot be read, files 124that cannot be opened, and so on. 125This is the default case. 126This option exists solely for conformance with 127.St -xpg4 . 128.It Fl s 129Display an entry for each specified file. 130(Equivalent to 131.Fl d Li 0 ) 132.It Fl t Ar threshold 133Display only entries for which size exceeds 134.Ar threshold . 135If 136.Ar threshold 137is negative, display only entries for which size is less than the absolute 138value of 139.Ar threshold . 140.It Fl x 141File system mount points are not traversed. 142.El 143.Pp 144The 145.Nm 146utility counts the storage used by symbolic links and not the files they 147reference unless the 148.Fl H 149or 150.Fl L 151option is specified. 152If either the 153.Fl H 154or 155.Fl L 156option is specified, storage used by any symbolic links which are 157followed is not counted (or displayed). 158The 159.Fl H , 160.Fl L 161and 162.Fl P 163options override each other and the command's actions are determined 164by the last one specified. 165.Pp 166The 167.Fl h, k 168and 169.Fl m 170options all override each other; the last one specified determines 171the block counts used. 172.Sh ENVIRONMENT 173.Bl -tag -width BLOCKSIZE 174.It Ev BLOCKSIZE 175If the environment variable 176.Ev BLOCKSIZE 177is set, and the 178.Fl h, k 179or 180.Fl m 181options are not specified, the block counts will be displayed in units of 182that block size. 183If 184.Ev BLOCKSIZE 185is not set, and the 186.Fl h, k 187or 188.Fl m 189options are not specified, the block counts will be displayed in 512-byte 190blocks. 191.El 192.Sh SEE ALSO 193.Xr df 1 , 194.Xr chflags 2 , 195.Xr fts 3 , 196.Xr symlink 7 , 197.Xr quot 8 198.Sh HISTORY 199A 200.Nm 201command appeared in 202.At v1 . 203