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.\" $FreeBSD$ 34.\" 35.Dd April 1, 1994 36.Dt DU 1 37.Os 38.Sh NAME 39.Nm du 40.Nd display disk usage statistics 41.Sh SYNOPSIS 42.Nm 43.Op Fl H | L | P 44.Op Fl I Ar mask 45.Op Fl a | s | d Ar depth 46.Op Fl c 47.Op Fl h | k 48.Op Fl x 49.Op Ar 50.Sh DESCRIPTION 51The 52.Nm 53utility displays the file system block usage for each file argument 54and for each directory in the file hierarchy rooted in each directory 55argument. 56If no file is specified, the block usage of the hierarchy rooted in 57the current directory is displayed. 58If the 59.Fl k 60flag is specified, the number of 1024-byte 61blocks used by the file is displayed, otherwise 62.Xr getbsize 3 63is used to determine the preferred block size. 64Partial numbers of blocks are rounded up. 65.Pp 66The options are as follows: 67.Bl -tag -width indent 68.It Fl H 69Symbolic links on the command line are followed, symbolic links in file 70hierarchies are not followed. 71.It Fl L 72Symbolic links on the command line and in file hierarchies are followed. 73.It Fl I Ar mask 74Ignore files and directories matching the specified 75.Ar mask . 76.It Fl P 77No symbolic links are followed. 78This is the default. 79.It Fl a 80Display an entry for each file in a file hierarchy. 81.It Fl h 82"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, 83Gigabyte, Terabyte and Petabyte 84.It Fl r 85Generate messages about directories that cannot be read, files 86that cannot be opened, and so on. This is the default case. 87This option exists solely for conformance with 88.St -xpg4 . 89.It Fl s 90Display an entry for each specified file. 91(Equivalent to 92.Fl d Li 0 ) 93.It Fl d Ar depth 94Display an entry for all files and directories 95.Ar depth 96directories deep. 97.It Fl c 98Display a grand total. 99.It Fl k 100Display block counts in 1024-byte (1-Kbyte) blocks. 101.It Fl x 102Filesystem mount points are not traversed. 103.El 104.Pp 105.Nm Du 106counts the storage used by symbolic links and not the files they 107reference unless the 108.Fl H 109or 110.Fl L 111option is specified. 112If either the 113.Fl H 114or 115.Fl L 116options are specified, storage used by any symbolic links which are 117followed is not counted or displayed. 118.Pp 119Files having multiple hard links are counted (and displayed) a single 120time per 121.Nm 122execution. 123.Sh ENVIRONMENT 124.Bl -tag -width BLOCKSIZE 125.It Ev BLOCKSIZE 126If the environment variable 127.Ev BLOCKSIZE 128is set, and the 129.Fl k 130option is not specified, the block counts will be displayed in units of that 131size block. 132If 133.Ev BLOCKSIZE 134is not set, and the 135.Fl k 136option is not specified, the block counts will be displayed in 512-byte blocks. 137.El 138.Sh SEE ALSO 139.Xr df 1 , 140.Xr fts 3 , 141.Xr symlink 7 , 142.Xr quot 8 143.Sh HISTORY 144A 145.Nm 146command appeared in 147.At v1 . 148