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.\" 31.Dd April 1, 1994 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 H | L | P 40.Op Fl I Ar mask 41.Op Fl a | s | d Ar depth 42.Op Fl c 43.Op Fl h | k 44.Op Fl x 45.Op Fl t 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 t 91Calculate the apparent size based on the file size (st_size) instead 92of the actual media space used based on st_blkcnt. This is meant to 93give the caller an idea of how much data is present in actual transmittable 94bytes if it was to be copied or sent elsewhere. 95.Pp 96To make this calculation 97.Nm 98uses st_size and assumes a media blocking granularity of 512 bytes. 99Any holes present in the file are counted as transmittable data. 100.It Fl d Ar depth 101Display an entry for all files and directories 102.Ar depth 103directories deep. 104.It Fl c 105Display a grand total. 106.It Fl k 107Display block counts in 1024-byte (1-Kbyte) blocks. 108.It Fl x 109File system mount points are not traversed. 110.El 111.Pp 112The 113.Nm 114utility counts the storage used by symbolic links and not the files they 115reference unless the 116.Fl H 117or 118.Fl L 119option is specified. 120If either the 121.Fl H 122or 123.Fl L 124options are specified, storage used by any symbolic links which are 125followed is not counted or displayed. 126.Pp 127Files having multiple hard links are counted (and displayed) a single 128time per 129.Nm 130execution. 131.Sh ENVIRONMENT 132.Bl -tag -width BLOCKSIZE 133.It Ev BLOCKSIZE 134If the environment variable 135.Ev BLOCKSIZE 136is set, and the 137.Fl k 138option is not specified, the block counts will be displayed in units of that 139size block. 140If 141.Ev BLOCKSIZE 142is not set, and the 143.Fl k 144option is not specified, the block counts will be displayed in 512-byte blocks. 145.El 146.Sh SEE ALSO 147.Xr df 1 , 148.Xr fts 3 , 149.Xr symlink 7 , 150.Xr quot 8 151.Sh HISTORY 152A 153.Nm 154command appeared in 155.At v1 . 156