df/df.1

   1 .\" Copyright (c) 1989, 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 .\"     @(#)df.1        8.3 (Berkeley) 5/8/95
  33 .\" $FreeBSD: src/bin/df/df.1,v 1.18.2.7 2002/04/22 22:17:36 keramida Exp $
  34 .\"
  35 .Dd May 8, 1995
  36 .Dt DF 1
  37 .Os
  38 .Sh NAME
  39 .Nm df
  40 .Nd display free disk space
  41 .Sh SYNOPSIS
  42 .Nm df
  43 .Oo
  44 .Fl b | h | H | k |
  45 .Fl m | g | P
  46 .Oc
  47 .Op Fl ailn
  48 .Op Fl t
  49 .Op Fl T Ar type
  50 .Op Ar file | filesystem ...
  51 .Sh LEGACY SYNOPSIS
  52 .Nm df
  53 .Oo
  54 .Fl b | h | H | k |
  55 .Fl m | P
  56 .Oc
  57 .Op Fl ailn
  58 .Op Fl t Ar type
  59 .Op Fl T Ar type
  60 .Op Ar file | filesystem ...
  61 .Sh DESCRIPTION
  62 The
  63 .Nm df
  64 utility
  65 displays statistics about the amount of free disk space on the specified
  66 .Ar filesystem
  67 or on the filesystem of which
  68 .Ar file
  69 is a part.
  70 Values are displayed in 512-byte per block counts.
  71 If neither a file or a filesystem operand is specified,
  72 statistics for all mounted filesystems are displayed
  73 (subject to the
  74 .Fl t
  75 option below).
  76 .Pp
  77 The following options are available:
  78 .Bl -tag -width Ds
  79 .It Fl a
  80 Show all mount points, including those that were mounted with the MNT_IGNORE
  81 flag.
  82 .It Fl b
  83 Use (the default) 512-byte blocks.
  84 This is only useful as a way to override an
  85 .Ev BLOCKSIZE
  86 specification from the environment.
  87 .It Fl g
  88 Use 1073741824-byte (1-Gbyte) blocks rather than the default.
  89 Note that this overrides the
  90 .Ev BLOCKSIZE
  91 specification from the environment.
  92 .It Fl H
  93 "Human-readable" output.  Use unit suffixes: Byte, Kilobyte, Megabyte,
  94 Gigabyte, Terabyte and Petabyte in order to reduce the number of
  95 digits to three or less using base 10 for sizes.
  96 .It Fl h
  97 "Human-readable" output.  Use unit suffixes: Byte, Kilobyte, Megabyte,
  98 Gigabyte, Terabyte and Petabyte in order to reduce the number of
  99 digits to three or less using base 2 for sizes.
 100 .It Fl i
 101 Include statistics on the number of free inodes. This option is now the default to conform to
 102 .St -susv3
 103 Use
 104 .Fl P
 105 to suppress this output.
 106 .It Fl k
 107 Use 1024-byte (1-Kbyte) blocks, rather than the default.
 108 Note that this overrides the
 109 .Ev BLOCKSIZE
 110 specification from the environment.
 111 .It Fl l
 112 Only display information about locally-mounted filesystems.
 113 .It Fl m
 114 Use 1048576-byte (1-Mbyte) blocks rather than the default.  Note that
 115 this overrides the
 116 .Ev BLOCKSIZE
 117 specification from the environment.
 118 .It Fl n
 119 Print out the previously obtained statistics from the filesystems.
 120 This option should be used if it is possible that one or more
 121 filesystems are in a state such that they will not be able to provide
 122 statistics without a long delay.
 123 When this option is specified,
 124 .Nm df
 125 will not request new statistics from the filesystems, but will respond
 126 with the possibly stale statistics that were previously obtained.
 127 .It Fl P
 128 Use (the default) 512-byte blocks.
 129 This is only useful as a way to override an
 130 .Ev BLOCKSIZE
 131 specification from the environment.
 132 .It Fl T
 133 Only print out statistics for filesystems of the specified types.
 134 More than one type may be specified in a comma separated list.
 135 The list of filesystem types can be prefixed with
 136 .Dq no
 137 to specify the filesystem types for which action should
 138 .Em not
 139 be taken.
 140 For example, the
 141 .Nm df
 142 command:
 143 .Bd -literal -offset indent
 144 df -T nonfs,mfs
 145 .Ed
 146 .Pp
 147 lists all filesystems except those of type
 148 .Tn NFS
 149 and
 150 .Tn MFS .
 151 The
 152 .Xr lsvfs 1
 153 command can be used to find out the types of filesystems
 154 that are available on the system.
 155 .It Fl t
 156 If used with no arguments,
 157 this option is a no-op
 158 (Mac OS X already prints the total allocated-space figures).
 159 If used with an argument, it acts like
 160 .Fl T ,
 161 but this usage is deprecated and should not be relied upon.
 162 .El
 163 .Sh ENVIRONMENT
 164 .Bl -tag -width BLOCKSIZE
 165 .It Ev BLOCKSIZE
 166 If the environment variable
 167 .Ev BLOCKSIZE
 168 is set, the block counts will be displayed in units of that size block.
 169 .El
 170 .Sh BUGS
 171 The
 172 .Fl n
 173 and
 174 .Fl t
 175 flags are ignored if a file or filesystem is specified.
 176 .Sh LEGACY DESCRIPTION
 177 The "capacity" percentage is normally rounded up to the next higher integer.
 178 In legacy mode, it is rounded down to the next lower integer.
 179 .Pp
 180 When the
 181 .Fl P
 182 option and the
 183 .Fl k
 184 option are used together,
 185 sizes are reported in 1024-blocks.
 186 In legacy mode, when the
 187 .Fl P
 188 option and
 189 .Fl k
 190 option are used together,
 191 the last option specified dictates the reported block size.
 192 .Pp
 193 The
 194 .Fl t
 195 option is normally a no-op
 196 (Mac OS X already prints the total allocated-space figures).
 197 In legacy mode, it is equivalent to
 198 .Fl T .
 199 .Pp
 200 For more information about legacy mode, see
 201 .Xr compat 5 .
 202 .Sh SEE ALSO
 203 .Xr lsvfs 1 ,
 204 .Xr quota 1 ,
 205 .Xr fstatfs 2 ,
 206 .Xr getfsstat 2 ,
 207 .Xr statfs 2 ,
 208 .Xr getmntinfo 3 ,
 209 .Xr compat 5 ,
 210 .Xr fstab 5 ,
 211 .Xr mount 8 ,
 212 .Xr quot 8
 213 .Sh HISTORY
 214 A
 215 .Nm df
 216 command appeared in
 217 .At v1 .