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DF(1)			     BSD Reference Manual			 DF(1)

NAME
     df - display free disk space

SYNOPSIS
     df [-aikn] [-t type] [file | filesystem ...]

DESCRIPTION
     Df displays statistics about the amount of free disk space on the speci-
     fied filesystem or on the filesystem of which file is a part.  Values are
     displayed in 512-byte-per-block 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.  If this flag and the -t Flag are not
	     specified, df assumes -t noautofs which hides top level auto-
	     mounter (i.e. amd(8))  mount points.

     -i	     Include statistics on the number of free inodes.

     -k	     Display values in 1024-byte-per-block block counts.

     -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.

     -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 spec-
	     ify 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
	     sysctl(8) command can be used to find out the types of filesys-
	     tems that are available on the system:

		   sysctl vfs

ENVIRONMENT
     BLOCKSIZE	If the environmental variable BLOCKSIZE is set, (and the -k
		flag is not specified), 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
     quota(1),	statfs(2),  fstatfs(2),	 getfsstat(2),	getmntinfo(3),
     fstab(5),	mount(8),  quot(8),  sysctl(8)

HISTORY
     A df command appeared in Version 6 AT&T UNIX.

4th Berkeley Distribution	 Mar 17, 1999				     1
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