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29 .\" @(#)df.1 8.3 (Berkeley) 5/8/95
36 .Nd display free disk space
40 .Op Fl b | g | H | h | k | m | P
44 .Op Ar file | filesystem ...
49 displays statistics about the amount of free disk space on the specified
52 or on the file system of which
55 By default block counts are displayed with an assumed block size of
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:
64 .Bl -tag -width indent
68 in a selection of different human and machine readable formats.
71 for details on command line arguments.
73 Show all mount points, including those that were mounted with the
76 This is implied for file systems specified on the command line.
78 Explicitly use 512 byte blocks, overriding any
80 specification from the environment.
81 This is the same as the
86 option overrides this option.
88 Display a grand total.
90 Use 1073741824 byte (1 Gibibyte) blocks rather than the default.
93 specification from the environment.
97 Use unit suffixes: Byte, Kibibyte, Mebibyte, Gibibyte, Tebibyte and
98 Pebibyte (based on powers of 1024) in order to reduce the number of
99 digits to four or fewer.
103 but based on powers of 1000.
105 Include statistics on the number of free and used inodes.
106 In conjunction with the
110 options, the number of inodes is scaled by powers of 1000.
111 In case the filesystem has no inodes then
113 is displayed instead of the usage percentage.
115 Use 1024 byte (1 Kibibyte) blocks rather than the default.
120 specification from the environment.
122 Select locally-mounted file system for display.
123 If used in combination with the
125 option, file system types will be added or excluded acccording to the
126 parameters of that option.
128 Use 1048576 byte (1 Mebibyte) blocks rather than the default.
131 specification from the environment.
133 Print out the previously obtained statistics from the file systems.
134 This option should be used if it is possible that one or more
135 file systems are in a state such that they will not be able to provide
136 statistics without a long delay.
137 When this option is specified,
139 will not request new statistics from the file systems, but will respond
140 with the possibly stale statistics that were previously obtained.
142 Explicitly use 512 byte blocks, overriding any
144 specification from the environment.
145 This is the same as the
150 option overrides this option.
152 Select file systems to display.
153 More than one type may be specified in a comma separated list.
154 The list of file system types can be prefixed with
156 to specify the file system types for which action should
159 If used in combination with the
161 option, the parameters of this option will modify the list of
162 locally-mounted file systems selected by the
168 .Bd -literal -offset indent
172 lists all file systems except those of type NFS and NULLFS.
175 command can be used to find out the types of file systems
176 that are available on the system.
178 Include file system type.
180 (Comma) Print sizes grouped and separated by thousands using the
181 non-monetary separator returned by
183 typically a comma or period.
184 If no locale is set, or the locale does not have a non-monetary separator, this
185 option has no effect.
188 .Bl -tag -width BLOCKSIZE
190 Specifies the units in which to report block counts.
193 which allows units of bytes or numbers scaled with the letters
195 (for multiples of 1024 bytes),
197 (for multiples of 1048576 bytes) or
200 The allowed range is 512 bytes to 1 GB.
201 If the value is outside, it will be set to the appropriate limit.
204 Show human readable free disk space for all mount points including file system
206 .Bd -literal -offset indent
208 Filesystem Type Size Used Avail Capacity Mounted on
209 /dev/ada1p2 ufs 213G 152G 44G 78% /
210 devfs devfs 1.0K 1.0K 0B 100% /dev
211 /dev/ada0p1 ufs 1.8T 168G 1.5T 10% /data
212 linsysfs linsysfs 4.0K 4.0K 0B 100% /compat/linux/sys
213 /dev/da0 msdosfs 7.6G 424M 7.2G 5% /mnt/usb
216 Show previously collected data including inode statistics except for devfs or
217 linsysfs file systems.
220 prefix affects all the file systems in the list and the
222 option can be specified only once:
223 .Bd -literal -offset indent
224 $ df -i -n -t nodevfs,linsysfs
225 Filesystem 1K-blocks Used Avail Capacity iused ifree %iused
227 /dev/ada1p2 223235736 159618992 45757888 78% 1657590 27234568 6% /
228 /dev/ada0p1 1892163184 176319420 1564470712 10% 1319710 243300576 1%
230 /dev/da0 7989888 433664 7556224 5% 0 0 100%
234 Show human readable information for the file system containing the file
236 .Bd -literal -offset indent
238 Filesystem Size Used Avail Capacity Mounted on
239 /dev/ada1p2 213G 152G 44G 78% /
242 Same as above but specifying some file system:
243 .Bd -literal -offset indent
245 Filesystem Size Used Avail Capacity Mounted on
246 /dev/ada1p2 213G 152G 44G 78% /
249 For non-Unix file systems, the reported values of used and free inodes
250 may have a different meaning than that of used and available files and
252 An example is msdosfs, which in the case of FAT12 or FAT16 file systems
253 reports the number of available and free root directory entries instead
256 where 1 to 21 such directory entries are required to store
257 each file or directory name or disk label
269 .Xr xo_parse_args 3 ,
276 With the exception of most options,
281 which defines only the
294 flag is ignored if a file or file system is specified.
296 point is not accessible by the user, it is possible that the file system
297 information could be stale.
303 options are identical.
304 The former comes from the BSD tradition, and the latter is required