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 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. 55If the 56.Fl k 57flag is specified, the number of 1024-byte 58blocks used by the file is displayed, otherwise 59.Xr getbsize 3 60is used to determine the preferred block size. 61Partial numbers of blocks are rounded up. 62.Pp 63The options are as follows: 64.Bl -tag -width indent 65.It Fl H 66Symbolic links on the command line are followed, symbolic links in file 67hierarchies are not followed. 68.It Fl L 69Symbolic links on the command line and in file hierarchies are followed. 70.It Fl I Ar mask 71Ignore files and directories matching the specified 72.Ar mask . 73.It Fl P 74No symbolic links are followed. 75This is the default. 76.It Fl a 77Display an entry for each file in a file hierarchy. 78.It Fl h 79"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, 80Gigabyte, Terabyte and Petabyte 81.It Fl r 82Generate messages about directories that cannot be read, files 83that cannot be opened, and so on. This is the default case. 84This option exists solely for conformance with 85.St -xpg4 . 86.It Fl s 87Display an entry for each specified file. 88(Equivalent to 89.Fl d Li 0 ) 90.It Fl d Ar depth 91Display an entry for all files and directories 92.Ar depth 93directories deep. 94.It Fl c 95Display a grand total. 96.It Fl k 97Display block counts in 1024-byte (1-Kbyte) blocks. 98.It Fl x 99File system mount points are not traversed. 100.El 101.Pp 102The 103.Nm 104utility counts the storage used by symbolic links and not the files they 105reference unless the 106.Fl H 107or 108.Fl L 109option is specified. 110If either the 111.Fl H 112or 113.Fl L 114options are specified, storage used by any symbolic links which are 115followed is not counted or displayed. 116.Pp 117Files having multiple hard links are counted (and displayed) a single 118time per 119.Nm 120execution. 121.Sh ENVIRONMENT 122.Bl -tag -width BLOCKSIZE 123.It Ev BLOCKSIZE 124If the environment variable 125.Ev BLOCKSIZE 126is set, and the 127.Fl k 128option is not specified, the block counts will be displayed in units of that 129size block. 130If 131.Ev BLOCKSIZE 132is not set, and the 133.Fl k 134option is not specified, the block counts will be displayed in 512-byte blocks. 135.El 136.Sh SEE ALSO 137.Xr df 1 , 138.Xr fts 3 , 139.Xr symlink 7 , 140.Xr quot 8 141.Sh HISTORY 142A 143.Nm 144command appeared in 145.At v1 . 146