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29 .\" @(#)df.1 8.3 (Berkeley) 5/8/95
37 .Nd display free disk space
40 .Op Fl b | g | H | h | k | m | P
43 .Op Ar file | filesystem ...
48 displays statistics about the amount of free disk space on the specified
50 or on the file system of which
53 Values are displayed in 512-byte per block counts.
54 If neither a file or a file system operand is specified,
55 statistics for all mounted file systems are displayed
60 The following options are available:
63 Show all mount points, including those that were mounted with the MNT_IGNORE
66 Use 512-byte blocks rather than the default.
70 specification from the environment.
72 Display a grand total.
74 Use 1073741824-byte (1-Gbyte) blocks rather than the default.
78 specification from the environment.
80 "Human-readable" output.
81 Use unit suffixes: Byte, Kilobyte, Megabyte,
82 Gigabyte, Terabyte and Petabyte in order to reduce the number of
83 digits to four or fewer using base 10 for sizes.
85 "Human-readable" output.
86 Use unit suffixes: Byte, Kilobyte, Megabyte,
87 Gigabyte, Terabyte and Petabyte in order to reduce the number of
88 digits to four or fewer using base 2 for sizes.
90 Include statistics on the number of free inodes.
92 Use 1024-byte (1-Kbyte) blocks rather than the default.
96 specification from the environment.
98 Only display information about locally-mounted file systems.
100 Use 1048576-byte (1-Mbyte) blocks rather than the default.
104 specification from the environment.
106 Print out the previously obtained statistics from the file systems.
107 This option should be used if it is possible that one or more
108 file systems are in a state such that they will not be able to provide
109 statistics without a long delay.
110 When this option is specified,
112 will not request new statistics from the file systems, but will respond
113 with the possibly stale statistics that were previously obtained.
115 Use POSIX compliant output of 512-byte blocks rather than the default.
116 Note that this overrides the
118 specification from the environment.
120 Only print out statistics for file systems of the specified types.
121 More than one type may be specified in a comma separated list.
122 The list of file system types can be prefixed with
124 to specify the file system types for which action should
130 .Bd -literal -offset indent
134 lists all file systems except those of type
140 command can be used to find out the types of file systems
141 that are available on the system.
144 .Bl -tag -width BLOCKSIZE
146 If the environment variable
148 is set, the block counts will be displayed in units of that size block.
168 flag is ignored if a file or file system is specified.
170 point is not accessible by the user, it is possible that the file system
171 information could be stale.