Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
DF(1)			FreeBSD	General	Commands Manual			 DF(1)

NAME
     df	-- display free	disk space

SYNOPSIS
     df	[-b | -g | -H |	-h | -k	| -m | -P] [-aciln] [-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.
     Values are	displayed in 512-byte per block	counts.	 If neither a file or
     a file system operand is specified, statistics for	all mounted file sys-
     tems 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.

     -b	     Use 512-byte blocks rather	than the default.  Note	that this
	     overrides the BLOCKSIZE specification from	the environment.

     -c	     Display a grand total.

     -g	     Use 1073741824-byte (1-Gbyte) blocks rather than the default.
	     Note that this overrides the BLOCKSIZE specification from the
	     environment.

     -H	     "Human-readable" output.  Use unit	suffixes: Byte,	Kilobyte,
	     Megabyte, Gigabyte, Terabyte and Petabyte in order	to reduce the
	     number of digits to four or fewer using base 10 for sizes.

     -h	     "Human-readable" output.  Use unit	suffixes: Byte,	Kilobyte,
	     Megabyte, Gigabyte, Terabyte and Petabyte in order	to reduce the
	     number of digits to four or fewer using base 2 for	sizes.

     -i	     Include statistics	on the number of free inodes.

     -k	     Use 1024-byte (1-Kbyte) blocks rather than	the default.  Note
	     that this overrides the BLOCKSIZE specification from the environ-
	     ment.

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

     -m	     Use 1048576-byte (1-Mbyte)	blocks rather than the default.	 Note
	     that this overrides the BLOCKSIZE specification from the environ-
	     ment.

     -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	     Use POSIX compliant output	of 512-byte blocks rather than the
	     default.  Note that this overrides	the BLOCKSIZE specification
	     from the environment.

     -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.

ENVIRONMENT
     BLOCKSIZE	If the environment variable BLOCKSIZE is set, the block	counts
		will be	displayed in units of that size	block.

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

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.

FreeBSD	9.2			April 22, 2004			   FreeBSD 9.2

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

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=df&sektion=1&manpath=FreeBSD+7.1-RELEASE>

home | help