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