df man page on aLinux

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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 contain‐
       ing  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
       systems	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

       -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

       SIZE may be (or may be an integer optionally followed by) one  of  fol‐
       lowing: 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 bugs to <bug-coreutils@gnu.org>.

COPYRIGHT
       Copyright © 2008 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 programs are properly installed at your site, the com‐
       mand

	      info df

       should give you access to the complete manual.

GNU coreutils 6.9.92.4-f088d-dirtJanuary 2008				 DF(1)
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