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 June 2, 2004 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 | m 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. 58.Pp 59The options are as follows: 60.Bl -tag -width indent 61.It Fl H 62Symbolic links on the command line are followed, symbolic links in file 63hierarchies are not followed. 64.It Fl L 65Symbolic links on the command line and in file hierarchies are followed. 66.It Fl I Ar mask 67Ignore files and directories matching the specified 68.Ar mask . 69.It Fl P 70No symbolic links are followed. 71This is the default. 72.It Fl a 73Display an entry for each file in a file hierarchy. 74.It Fl h 75"Human-readable" output. 76Use unit suffixes: Byte, Kilobyte, Megabyte, 77Gigabyte, Terabyte and Petabyte. 78.It Fl r 79Generate messages about directories that cannot be read, files 80that cannot be opened, and so on. 81This is the default case. 82This option exists solely for conformance with 83.St -xpg4 . 84.It Fl s 85Display an entry for each specified file. 86(Equivalent to 87.Fl d Li 0 ) 88.It Fl d Ar depth 89Display an entry for all files and directories 90.Ar depth 91directories deep. 92.It Fl c 93Display a grand total. 94.It Fl k 95Display block counts in 1024-byte (1-Kbyte) blocks. 96.It Fl m 97Display block counts in 1048576-byte (1-Mbyte) 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