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 May 6, 2006 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 a | s | d Ar depth 45.Op Fl c 46.Op Fl h | k | m 47.Op Fl n 48.Op Fl x 49.Op Fl I Ar mask 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. 59.Pp 60The options are as follows: 61.Bl -tag -width indent 62.It Fl H 63Symbolic links on the command line are followed, symbolic links in file 64hierarchies are not followed. 65.It Fl L 66Symbolic links on the command line and in file hierarchies are followed. 67.It Fl I Ar mask 68Ignore files and directories matching the specified 69.Ar mask . 70.It Fl P 71No symbolic links are followed. 72This is the default. 73.It Fl a 74Display an entry for each file in a file hierarchy. 75.It Fl h 76"Human-readable" output. 77Use unit suffixes: Byte, Kilobyte, Megabyte, 78Gigabyte, Terabyte and Petabyte. 79.It Fl r 80Generate messages about directories that cannot be read, files 81that cannot be opened, and so on. 82This is the default case. 83This option exists solely for conformance with 84.St -xpg4 . 85.It Fl s 86Display an entry for each specified file. 87(Equivalent to 88.Fl d Li 0 ) 89.It Fl d Ar depth 90Display an entry for all files and directories 91.Ar depth 92directories deep. 93.It Fl c 94Display a grand total. 95.It Fl k 96Display block counts in 1024-byte (1-Kbyte) blocks. 97.It Fl m 98Display block counts in 1048576-byte (1-Mbyte) blocks. 99.It Fl n 100Ignore files and directories with user 101.Dq nodump 102flag 103.Pq Dv UF_NODUMP 104set. 105.It Fl x 106File system mount points are not traversed. 107.El 108.Pp 109The 110.Nm 111utility counts the storage used by symbolic links and not the files they 112reference unless the 113.Fl H 114or 115.Fl L 116option is specified. 117If either the 118.Fl H 119or 120.Fl L 121options are specified, storage used by any symbolic links which are 122followed is not counted or displayed. 123.Pp 124Files having multiple hard links are counted (and displayed) a single 125time per 126.Nm 127execution. 128.Sh ENVIRONMENT 129.Bl -tag -width BLOCKSIZE 130.It Ev BLOCKSIZE 131If the environment variable 132.Ev BLOCKSIZE 133is set, and the 134.Fl k 135option is not specified, the block counts will be displayed in units of that 136size block. 137If 138.Ev BLOCKSIZE 139is not set, and the 140.Fl k 141option is not specified, the block counts will be displayed in 512-byte blocks. 142.El 143.Sh SEE ALSO 144.Xr df 1 , 145.Xr chflags 2 , 146.Xr fts 3 , 147.Xr symlink 7 , 148.Xr quot 8 149.Sh HISTORY 150A 151.Nm 152command appeared in 153.At v1 . 154