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DF(1)			  BSD General Commands Manual			 DF(1)

NAME
     df — display free disk space

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

DESCRIPTION
     The df utility displays statistics about the amount of free disk space on
     the specified filesystem or on the filesystem of which file is a part.
     Values are displayed in 512-byte per block counts.	 If neither a file or
     a filesystem operand is specified, statistics for all mounted filesystems
     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.

     -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 three or less 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 three or less 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 filesystems.

     -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 filesys‐
	     tems.  This option should be used if it is possible that one or
	     more filesystems 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 filesys‐
	     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 filesystems of the specified types.
	     More than one type may be specified in a comma separated list.
	     The list of filesystem types can be prefixed with “no” to specify
	     the filesystem types for which action should not be taken.	 For
	     example, the df command:

		   df -t nonfs,mfs

	     lists all filesystems except those of type NFS and MFS.  The
	     lsvfs(1) command can be used to find out the types of filesystems
	     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.

BUGS
     The -n and -t flags are ignored if a file or filesystem is specified.

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.

BSD				  May 8, 1995				   BSD
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