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DF(1)			FreeBSD	General	Commands Manual			 DF(1)

NAME
     df	-- display free	disk space

SYNOPSIS
     df	[-b | -g | -H |	-h | -k	| -m | -P] [-acilnT] [-,] [-t type]
	[file |	filesystem ...]

DESCRIPTION
     The df utility displays statistics	about the amount of free disk space on
     the specified file	system or on the file system of	which file is a	part.
     By	default	block counts are displayed with	an assumed block size of 512
     bytes.  If	neither	a file or a file system	operand	is specified, statis-
     tics for all mounted file systems are displayed (subject to the -t	option
     below).

     The following options are available:

     -a	     Show all mount points, including those that were mounted with the
	     MNT_IGNORE	flag.  This is implied for file	systems	specified on
	     the command line.

     -b	     Explicitly	use 512	byte blocks, overriding	any BLOCKSIZE specifi-
	     cation from the environment.  This	is the same as the -P option.
	     The -k option overrides this option.

     -c	     Display a grand total.

     -g	     Use 1073741824 byte (1 Gibibyte) blocks rather than the default.
	     This overrides any	BLOCKSIZE specification	from the environment.

     -H	     ``Human-readable''	output.	 Use unit suffixes: Byte, Kibibyte,
	     Mebibyte, Gibibyte, Tebibyte and Pebibyte (based on powers	of
	     1024) in order to reduce the number of digits to four or fewer.

     -h	     ``Human-readable''	output.	 Use unit suffixes: Byte, Kilobyte,
	     Megabyte, Gigabyte, Terabyte and Petabyte (based on powers	of
	     1000) in order to reduce the number of digits to four or fewer.

     -i	     Include statistics	on the number of free and used inodes.	In
	     conjunction with the -h or	-H options, the	number of inodes is
	     scaled by powers of 1000.

     -k	     Use 1024 byte (1 Kibibyte)	blocks rather than the default.	 This
	     overrides the -P option and any BLOCKSIZE specification from the
	     environment.

     -l	     Only display information about locally-mounted file systems.

     -m	     Use 1048576 byte (1 Mebibyte) blocks rather than the default.
	     This overrides any	BLOCKSIZE specification	from the environment.

     -n	     Print out the previously obtained statistics from the file	sys-
	     tems.  This option	should be used if it is	possible that one or
	     more file systems are in a	state such that	they will not be able
	     to	provide	statistics without a long delay.  When this option is
	     specified,	df will	not request new	statistics from	the file sys-
	     tems, but will respond with the possibly stale statistics that
	     were previously obtained.

     -P	     Explicitly	use 512	byte blocks, overriding	any BLOCKSIZE specifi-
	     cation from the environment.  This	is the same as the -b option.
	     The -k option overrides this option.

     -t	     Only print	out statistics for file	systems	of the specified
	     types.  More than one type	may be specified in a comma separated
	     list.  The	list of	file system types can be prefixed with ``no''
	     to	specify	the file system	types for which	action should not be
	     taken.  For example, the df command:

		   df -t nonfs,nullfs

	     lists all file systems except those of type NFS and NULLFS.  The
	     lsvfs(1) command can be used to find out the types	of file	sys-
	     tems that are available on	the system.

     -T	     Include file system type.

     -,	     (Comma) Print sizes grouped and separated by thousands using the
	     non-monetary separator returned by	localeconv(3), typically a
	     comma or period.  If no locale is set, or the locale does not
	     have a non-monetary separator, this option	has no effect.

ENVIRONMENT
     BLOCKSIZE	Specifies the units in which to	report block counts.  This
		uses getbsize(3), which	allows units of	bytes or numbers
		scaled with the	letters	k (for multiples of 1024 bytes), m
		(for multiples of 1048576 bytes) or g (for gibibytes).	The
		allowed	range is 512 bytes to 1	GB.  If	the value is outside,
		it will	be set to the appropriate limit.

SEE ALSO
     lsvfs(1), quota(1), fstatfs(2), getfsstat(2), statfs(2), getbsize(3),
     getmntinfo(3), localeconv(3), fstab(5), mount(8), pstat(8), quot(8),
     swapinfo(8)

STANDARDS
     With the exception	of most	options, the df	utility	conforms to IEEE Std
     1003.1-2004 (``POSIX.1''),	which defines only the -k, -P and -t options.

HISTORY
     A df command appeared in Version 1	AT&T UNIX.

BUGS
     The -n flag is ignored if a file or file system is	specified.  Also, if a
     mount point is not	accessible by the user,	it is possible that the	file
     system information	could be stale.

     The -b and	-P options are identical.  The former comes from the BSD tra-
     dition, and the latter is required	for IEEE Std 1003.1-2004 (``POSIX.1'')
     conformity.

FreeBSD	10.1		       January 24, 2013			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | ENVIRONMENT | SEE ALSO | STANDARDS | HISTORY | BUGS

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