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

NAME
     df — display free disk space

SYNOPSIS
     df [-in] [-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:

     -i	     Include statistics on the number of free inodes.

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

		   sysctl vfs

ENVIRONMENTAL VARIABLES
     BLOCKSIZE	If the environmental 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
     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	  May 8, 1995	     4th Berkeley Distribution
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