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DF(1)					  User Commands 				    DF(1)

NAME
       df - report file system disk space usage

SYNOPSIS
       df [OPTION]... [FILE]...

DESCRIPTION
       This  manual  page  documents the GNU version of df.  df displays the amount of disk space
       available on the file system containing each file name  argument.   If  no  file  name  is
       given,  the space available on all currently mounted file systems is shown.  Disk space is
       shown in 1K blocks by default, unless the environment variable POSIXLY_CORRECT is set,  in
       which case 512-byte blocks are used.

       If  an  argument is the absolute file name of a disk device node containing a mounted file
       system, df shows the space available on that file system rather than on	the  file  system
       containing  the	device	node  (which is always the root file system).  This version of df
       cannot show the space available on unmounted file systems, because on most kinds  of  sys-
       tems doing so requires very nonportable intimate knowledge of file system structures.

OPTIONS
       Show  information about the file system on which each FILE resides, or all file systems by
       default.

       Mandatory arguments to long options are mandatory for short options too.

       -a, --all
	      include dummy file systems

       -B, --block-size=SIZE
	      use SIZE-byte blocks

       --total
	      produce a grand total

       -h, --human-readable
	      print sizes in human readable format (e.g., 1K 234M 2G)

       -H, --si
	      likewise, but use powers of 1000 not 1024

       -i, --inodes
	      list inode information instead of block usage

       -k     like --block-size=1K

       -l, --local
	      limit listing to local file systems

       --no-sync
	      do not invoke sync before getting usage info (default)

       -P, --portability
	      use the POSIX output format

       --sync invoke sync before getting usage info

       -t, --type=TYPE
	      limit listing to file systems of type TYPE

       -T, --print-type
	      print file system type

       -x, --exclude-type=TYPE
	      limit listing to file systems not of type TYPE

       -v     (ignored)

       --help display this help and exit

       --version
	      output version information and exit

       Display values are in units of  the  first  available  SIZE  from  --block-size,  and  the
       DF_BLOCK_SIZE,  BLOCK_SIZE  and BLOCKSIZE environment variables.  Otherwise, units default
       to 1024 bytes (or 512 if POSIXLY_CORRECT is set).

       SIZE may be (or may be an integer optionally followed by) one of  following:  KB  1000,	K
       1024, MB 1000*1000, M 1024*1024, and so on for G, T, P, E, Z, Y.

AUTHOR
       Written by Torbjorn Granlund, David MacKenzie, and Paul Eggert.

REPORTING BUGS
       Report df bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report df translation bugs to <http://translationproject.org/team/>

COPYRIGHT
       Copyright  (C)  2010  Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or
       later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO	WARRANTY,
       to the extent permitted by law.

SEE ALSO
       The  full documentation for df is maintained as a Texinfo manual.  If the info and df pro-
       grams are properly installed at your site, the command

	      info coreutils 'df invocation'

       should give you access to the complete manual.

GNU coreutils 8.5			  February 2011 				    DF(1)
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