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