df/df.1

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  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 $
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  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 .It Fl k
 104 Use 1024-byte (1-Kbyte) blocks, rather than the default.
 105 Note that this overrides the
 106 .Ev BLOCKSIZE
 107 specification from the environment.
 108 .It Fl l
 109 Only display information about locally-mounted filesystems.
 110 .It Fl m
 111 Use 1048576-byte (1-Mbyte) blocks rather than the default.  Note that
 112 this overrides the
 113 .Ev BLOCKSIZE
 114 specification from the environment.
 115 .It Fl n
 116 Print out the previously obtained statistics from the filesystems.
 117 This option should be used if it is possible that one or more
 118 filesystems are in a state such that they will not be able to provide
 119 statistics without a long delay.
 120 When this option is specified,
 121 .Nm df
 122 will not request new statistics from the filesystems, but will respond
 123 with the possibly stale statistics that were previously obtained.
 124 .It Fl P
 125 Use (the default) 512-byte blocks.
 126 This is only useful as a way to override an
 127 .Ev BLOCKSIZE
 128 specification from the environment.
 129 .It Fl T
 130 Only print out statistics for filesystems of the specified types.
 131 More than one type may be specified in a comma separated list.
 132 The list of filesystem types can be prefixed with
 133 .Dq no
 134 to specify the filesystem types for which action should
 135 .Em not
 136 be taken.
 137 For example, the
 138 .Nm df
 139 command:
 140 .Bd -literal -offset indent
 141 df -T nonfs,mfs
 142 .Ed
 143 .Pp
 144 lists all filesystems except those of type
 145 .Tn NFS
 146 and
 147 .Tn MFS .
 148 The
 149 .Xr lsvfs 1
 150 command can be used to find out the types of filesystems
 151 that are available on the system.
 152 .It Fl t
 153 If used with no arguments,
 154 this option is a no-op
 155 (Mac OS X already prints the total allocated-space figures).
 156 If used with an argument, it acts like
 157 .Fl T ,
 158 but this usage is deprecated and should not be relied upon.
 159 .El
 160 .Sh ENVIRONMENT
 161 .Bl -tag -width BLOCKSIZE
 162 .It Ev BLOCKSIZE
 163 If the environment variable
 164 .Ev BLOCKSIZE
 165 is set, the block counts will be displayed in units of that size block.
 166 .El
 167 .Sh BUGS
 168 The
 169 .Fl n
 170 and
 171 .Fl t
 172 flags are ignored if a file or filesystem is specified.
 173 .Sh LEGACY DESCRIPTION
 174 The "capacity" percentage is normally rounded up to the next higher integer.
 175 In legacy mode, it is rounded down to the next lower integer.
 176 .Pp
 177 When the
 178 .Fl P
 179 option and the
 180 .Fl k
 181 option are used together,
 182 sizes are reported in 1024-blocks.
 183 In legacy mode, when the
 184 .Fl P
 185 option and
 186 .Fl k
 187 option are used together,
 188 the last option specified dictates the reported block size.
 189 .Pp
 190 The
 191 .Fl t
 192 option is normally a no-op
 193 (Mac OS X already prints the total allocated-space figures).
 194 In legacy mode, it is equivalent to
 195 .Fl T .
 196 .Pp
 197 For more information about legacy mode, see
 198 .Xr compat 5 .
 199 .Sh SEE ALSO
 200 .Xr lsvfs 1 ,
 201 .Xr quota 1 ,
 202 .Xr fstatfs 2 ,
 203 .Xr getfsstat 2 ,
 204 .Xr statfs 2 ,
 205 .Xr getmntinfo 3 ,
 206 .Xr compat 5 ,
 207 .Xr fstab 5 ,
 208 .Xr mount 8 ,
 209 .Xr quot 8
 210 .Sh HISTORY
 211 A
 212 .Nm df
 213 command appeared in
 214 .At v1 .