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
  43 .Oo
  44 .Fl b | h | H | k |
  45 .Fl m | P
  46 .Oc
  47 .Op Fl ailn
  48 .Op Fl t Ar type
  49 .Op Ar file | filesystem ...
  50 .Sh DESCRIPTION
  51 The
  52 .Nm
  53 utility
  54 displays statistics about the amount of free disk space on the specified
  55 .Ar filesystem
  56 or on the filesystem of which
  57 .Ar file
  58 is a part.
  59 Values are displayed in 512-byte per block counts.
  60 If neither a file or a filesystem operand is specified,
  61 statistics for all mounted filesystems are displayed
  62 (subject to the
  63 .Fl t
  64 option below).
  65 .Pp
  66 The following options are available:
  67 .Bl -tag -width Ds
  68 .It Fl a
  69 Show all mount points, including those that were mounted with the MNT_IGNORE
  70 flag.
  71 .It Fl b
  72 Use 512-byte blocks rather than the default.  Note that
  73 this overrides the
  74 .Ev BLOCKSIZE
  75 specification from the environment.
  76 .It Fl g
  77 Use 1073741824-byte (1-Gbyte) blocks rather than the default.  Note that
  78 this overrides the
  79 .Ev BLOCKSIZE
  80 specification from the environment.
  81 .It Fl H
  82 "Human-readable" output.  Use unit suffixes: Byte, Kilobyte, Megabyte,
  83 Gigabyte, Terabyte and Petabyte in order to reduce the number of
  84 digits to three or less using base 10 for sizes.
  85 .It Fl h
  86 "Human-readable" output.  Use unit suffixes: Byte, Kilobyte, Megabyte,
  87 Gigabyte, Terabyte and Petabyte in order to reduce the number of
  88 digits to three or less using base 2 for sizes.
  89 .It Fl i
  90 Include statistics on the number of free inodes.
  91 .It Fl k
  92 Use 1024-byte (1-Kbyte) blocks rather than the default.  Note that
  93 this overrides the
  94 .Ev BLOCKSIZE
  95 specification from the environment.
  96 .It Fl l
  97 Only display information about locally-mounted filesystems.
  98 .It Fl m
  99 Use 1048576-byte (1-Mbyte) blocks rather than the default.  Note that
 100 this overrides the
 101 .Ev BLOCKSIZE
 102 specification from the environment.
 103 .It Fl n
 104 Print out the previously obtained statistics from the filesystems.
 105 This option should be used if it is possible that one or more
 106 filesystems are in a state such that they will not be able to provide
 107 statistics without a long delay.
 108 When this option is specified,
 109 .Nm
 110 will not request new statistics from the filesystems, but will respond
 111 with the possibly stale statistics that were previously obtained.
 112 .It Fl P
 113 Use POSIX compliant output of 512-byte blocks rather than the default.
 114 Note that this overrides the
 115 .Ev BLOCKSIZE
 116 specification from the environment.
 117 .It Fl t
 118 Only print out statistics for filesystems of the specified types.
 119 More than one type may be specified in a comma separated list.
 120 The list of filesystem types can be prefixed with
 121 .Dq no
 122 to specify the filesystem types for which action should
 123 .Em not
 124 be taken.
 125 For example, the
 126 .Nm
 127 command:
 128 .Bd -literal -offset indent
 129 df -t nonfs,mfs
 130 .Ed
 131 .Pp
 132 lists all filesystems except those of type
 133 .Tn NFS
 134 and
 135 .Tn MFS .
 136 The
 137 .Xr lsvfs 1
 138 command can be used to find out the types of filesystems
 139 that are available on the system.
 140 .El
 141 .Sh ENVIRONMENT
 142 .Bl -tag -width BLOCKSIZE
 143 .It Ev BLOCKSIZE
 144 If the environment variable
 145 .Ev BLOCKSIZE
 146 is set, the block counts will be displayed in units of that size block.
 147 .El
 148 .Sh BUGS
 149 The
 150 .Fl n
 151 and
 152 .Fl t
 153 flags are ignored if a file or filesystem is specified.
 154 .Sh SEE ALSO
 155 .Xr lsvfs 1 ,
 156 .Xr quota 1 ,
 157 .Xr fstatfs 2 ,
 158 .Xr getfsstat 2 ,
 159 .Xr statfs 2 ,
 160 .Xr getmntinfo 3 ,
 161 .Xr fstab 5 ,
 162 .Xr mount 8 ,
 163 .Xr quot 8
 164 .Sh HISTORY
 165 A
 166 .Nm
 167 command appeared in
 168 .At v1 .