1 .\" Copyright (c) 1990, 1993
2 .\" The Regents of the University of California. All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
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.
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
32 .\" @(#)du.1 8.2 (Berkeley) 4/1/94
40 .Nd display disk usage statistics
45 .Op Fl a | s | d Ar depth
48 .Op Fl h | k | m | B Ar blocksize
56 utility displays the file system block usage for each file argument
57 and for each directory in the file hierarchy rooted in each directory
59 If no file is specified, the block usage of the hierarchy rooted in
60 the current directory is displayed.
62 The options are as follows:
63 .Bl -tag -width indent
65 Display the apparent size instead of the disk usage.
66 This can be helpful when operating on compressed volumes or sparse files.
68 Calculate block counts in
71 This is different from the
75 and gives an estimate of how much space the examined file hierachy would
76 require on a filesystem with the given
82 is rounded up to the next multiple of 512.
84 Symbolic links on the command line are followed, symbolic links in file
85 hierarchies are not followed.
87 Symbolic links on the command line and in file hierarchies are followed.
89 Ignore files and directories matching the specified
92 No symbolic links are followed.
95 Display an entry for each file in a file hierarchy.
97 "Human-readable" output.
98 Use unit suffixes: Byte, Kilobyte, Megabyte,
99 Gigabyte, Terabyte and Petabyte.
101 Generate messages about directories that cannot be read, files
102 that cannot be opened, and so on.
103 This is the default case.
104 This option exists solely for conformance with
107 Display an entry for each specified file.
111 Display an entry for all files and directories
115 Display a grand total.
117 Display block counts in 1024-byte (1-Kbyte) blocks.
119 If a file has multiple hard links, count its size many times.
120 The default behavior of
122 is to count files with multiple hard links only once.
125 option is specified, the hard link checks are disabled, and these files
126 are counted (and displayed) as many times as they are found.
128 Display block counts in 1048576-byte (1-Mbyte) blocks.
130 Ignore files and directories with user
136 File system mount points are not traversed.
141 utility counts the storage used by symbolic links and not the files they
151 options are specified, storage used by any symbolic links which are
152 followed is not counted or displayed.
154 .Bl -tag -width BLOCKSIZE
156 If the environment variable
162 options are not specified, the block counts will be displayed in units of
170 options are not specified, the block counts will be displayed in 512-byte