du/du.1

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  32 .\"     @(#)du.1        8.2 (Berkeley) 4/1/94
  33 .\" $FreeBSD: src/usr.bin/du/du.1,v 1.30 2005/05/21 09:55:05 ru Exp $
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  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 du
  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 x
  48 .Op Fl I Ar mask
  49 .Op Ar
  50 .Sh DESCRIPTION
  51 The
  52 .Nm du
  53 utility displays the file system block usage for each file argument
  54 and for each directory in the file hierarchy rooted in each directory
  55 argument.
  56 If no file is specified, the block usage of the hierarchy rooted in
  57 the current directory is displayed.
  58 .Pp
  59 The options are as follows:
  60 .Bl -tag -width indent
  61 .It Fl a
  62 Display an entry for each file in a file hierarchy.
  63 .It Fl c
  64 Display a grand total.
  65 .It Fl d Ar depth
  66 Display an entry for all files and directories
  67 .Ar depth
  68 directories deep.
  69 .It Fl H
  70 Symbolic links on the command line are followed, symbolic links in file
  71 hierarchies are not followed.
  72 .It Fl h
  73 "Human-readable" output.
  74 Use unit suffixes: Byte, Kilobyte, Megabyte,
  75 Gigabyte, Terabyte and Petabyte.
  76 .It Fl I Ar mask
  77 Ignore files and directories matching the specified
  78 .Ar mask .
  79 .It Fl k
  80 Display block counts in 1024-byte (1-Kbyte) blocks.
  81 .It Fl L
  82 Symbolic links on the command line and in file hierarchies are followed.
  83 .It Fl m
  84 Display block counts in 1048576-byte (1-Mbyte) blocks.
  85 .It Fl P
  86 No symbolic links are followed.
  87 This is the default.
  88 .It Fl r
  89 Generate messages about directories that cannot be read, files
  90 that cannot be opened, and so on.
  91 This is the default case.
  92 This option exists solely for conformance with
  93 .St -xpg4 .
  94 .It Fl s
  95 Display an entry for each specified file.
  96 (Equivalent to
  97 .Fl d Li 0 )
  98 .It Fl x
  99 File system mount points are not traversed.
 100 .El
 101 .Pp
 102 The
 103 .Nm du
 104 utility counts the storage used by symbolic links and not the files they
 105 reference unless the
 106 .Fl H
 107 or
 108 .Fl L
 109 option is specified.
 110 If either the
 111 .Fl H
 112 or
 113 .Fl L
 114 options are specified, storage used by any symbolic links which are
 115 followed is not counted or displayed.
 116 If more than one of the
 117 .Fl H ,
 118 .Fl L ,
 119 and
 120 .Fl P
 121 options is specified, the last one given is used.
 122 .Pp
 123 Files having multiple hard links are counted (and displayed) a single
 124 time per
 125 .Nm du
 126 execution.
 127 .Sh ENVIRONMENT
 128 .Bl -tag -width BLOCKSIZE
 129 .It Ev BLOCKSIZE
 130 If the environment variable
 131 .Ev BLOCKSIZE
 132 is set, and the
 133 .Fl k
 134 option is not specified, the block counts will be displayed in units of that
 135 size block.
 136 If
 137 .Ev BLOCKSIZE
 138 is not set, and the
 139 .Fl k
 140 option is not specified, the block counts will be displayed in 512-byte blocks.
 141 .El
 142 .Sh LEGACY DESCRIPTION
 143 In legacy mode, only one of the
 144 .Fl H ,
 145 .Fl L ,
 146 or
 147 .Fl P
 148 options may be specified.
 149 .Pp
 150 The command will detect and report a SYMLOOP error
 151 (loop involving symbolic links).
 152 In legacy mode, this is not the case.
 153 .Sh SEE ALSO
 154 .Xr df 1 ,
 155 .Xr fts 3 ,
 156 .Xr compat 5 ,
 157 .Xr symlink 7 ,
 158 .Xr quot 8
 159 .Sh HISTORY
 160 A
 161 .Nm du
 162 command appeared in
 163 .At v1 .