Unix/Linux Go Back    


OpenDarwin 7.2.1 - man page for df (opendarwin section 1)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


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 over-
	     rides 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 environment.

     -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 environment.

     -n      Print out the previously obtained statistics from the filesystems.  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 filesystems, 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
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 07:27 PM.