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28 .\" @(#)df.1 8.3 (Berkeley) 5/8/95
29 .\" $FreeBSD: src/bin/df/df.1,v 1.18.2.9 2003/05/07 23:56:14 trhodes Exp $
30 .\" $DragonFly: src/bin/df/df.1,v 1.3 2006/02/17 19:33:30 swildner Exp $
37 .Nd display free disk space
46 .Op Ar file | filesystem ...
51 displays statistics about the amount of free disk space on the specified
53 or on the file system of which
56 Values are displayed in 512-byte per block counts.
57 If neither a file or a file system operand is specified,
58 statistics for all mounted file systems are displayed
63 The following options are available:
66 Show all mount points, including those that were mounted with the
70 Use 512-byte blocks rather than the default. Note that
73 specification from the environment.
75 Use 1073741824-byte (1-Gbyte) blocks rather than the default. Note that
78 specification from the environment.
80 "Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte,
81 Gigabyte, Terabyte and Petabyte in order to reduce the number of
82 digits to four or fewer using base 10 for sizes.
84 "Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte,
85 Gigabyte, Terabyte and Petabyte in order to reduce the number of
86 digits to four or fewer using base 2 for sizes.
88 Include statistics on the number of free and used inodes.
89 In conjunction with the
93 options, the number of inodes is scaled by powers of 1000.
95 Use 1024-byte (1-Kbyte) blocks rather than the default. Note that
98 specification from the environment.
100 Only display information about locally-mounted file systems.
102 Use 1048576-byte (1-Mbyte) blocks rather than the default. Note that
105 specification from the environment.
107 Print out the previously obtained statistics from the file systems.
108 This option should be used if it is possible that one or more
109 file systems are in a state such that they will not be able to provide
110 statistics without a long delay.
111 When this option is specified,
113 will not request new statistics from the file systems, but will respond
114 with the possibly stale statistics that were previously obtained.
116 Use POSIX compliant output of 512-byte blocks rather than the default.
117 Note that this overrides the
119 specification from the environment.
121 Only print out statistics for file systems of the specified types.
122 More than one type may be specified in a comma separated list.
123 The list of file system types can be prefixed with
125 to specify the file system types for which action should
131 .Bd -literal -offset indent
135 lists all file systems except those of type
141 command can be used to find out the types of file systems
142 that are available on the system.
145 .Bl -tag -width BLOCKSIZE
147 If the environment variable
149 is set, the block counts will be displayed in units of that size block.
171 flags are ignored if a file or file system is specified.