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.\" $Id: du.1,v 1.8 1997/02/22 19:54:52 peter Exp $ 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 du 43.Op Fl H | Fl L | Fl P 44.Op Fl a | s | d Ar depth 45.Op Fl k 46.Op Fl x 47.Op Ar file ... 48.Sh DESCRIPTION 49The 50.Nm du 51utility displays the file system block usage for each file argument 52and for each directory in the file hierarchy rooted in each directory 53argument. 54If no file is specified, the block usage of the hierarchy rooted in 55the current directory is displayed. 56The number of blocks are in the same units as that returned by the 57.Xr stat 2 58system call, i.e. 512-byte blocks. 59If the 60.Fl k 61flag is specified, the number displayed is the number of 1024-byte 62blocks. 63Partial numbers of blocks are rounded up. 64.Pp 65The options are as follows: 66.Bl -tag -width Ds 67.It Fl H 68Symbolic links on the command line are followed. 69(Symbolic links encountered in the tree traversal are not followed.) 70.It Fl L 71All symbolic links are followed. 72.It Fl P 73No symbolic links are followed. 74.It Fl a 75Display an entry for each file in the file hierarchy. 76.It Fl d Ar depth 77Displays all directories only 78.Ar depth 79directories deep. 80.It Fl k 81Report in 1024-byte (1-Kbyte) blocks rather than the default. Note that 82this overrides the 83.Ev BLOCKSIZE 84setting from the environment. 85.It Fl s 86Display only the grand total for the specified files. 87.It Fl x 88Filesystem mount points are not traversed. 89.El 90.Pp 91.Nm Du 92counts the storage used by symbolic links and not the files they 93reference unless the 94.Fl H 95or 96.Fl L 97option is specified. 98If either the 99.Fl H 100or 101.Fl L 102options are specified, storage used by any symbolic links which are 103followed is not counted or displayed. 104The 105.Fl H , 106.Fl L 107and 108.Fl P 109options override each other and the command's actions are determined 110by the last one specified. 111.Pp 112Files having multiple hard links are counted (and displayed) a single 113time per 114.Nm du 115execution. 116.Sh ENVIRONMENT VARIABLES 117.Bl -tag -width BLOCKSIZE 118.It Ev BLOCKSIZE 119If the environment variable 120.Ev BLOCKSIZE 121is set, and the 122.Fl k 123option is not specified, the block counts will be displayed in units of that 124size block. 125.El 126.Sh SEE ALSO 127.Xr df 1 , 128.Xr fts 3 , 129.Xr symlink 7 , 130.Xr quot 8 131.Sh HISTORY 132A 133.Nm du 134command appeared in 135.At v1 . 136