.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.35.
.TH DF "1" "December 2006" "df 6.7" "User Commands"
.SH NAME
df \- report file system disk space usage
.SH SYNOPSIS
.B df
[\fIOPTION\fR]... [\fIFILE\fR]...
.SH DESCRIPTION
This manual page
documents the GNU version of
.BR df .
.B 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.
.PP
If an argument is the absolute file name of a disk device node containing a
mounted file system,
.B 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
.B 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.
.SH OPTIONS
.PP
Show information about the file system on which each FILE resides,
or all file systems by default.
.PP
Mandatory arguments to long options are mandatory for short options too.
.TP
\fB\-a\fR, \fB\-\-all\fR
include dummy file systems
.HP
\fB\-B\fR, \fB\-\-block\-size\fR=\fISIZE\fR use SIZE\-byte blocks
.TP
\fB\-h\fR, \fB\-\-human\-readable\fR
print sizes in human readable format (e.g., 1K 234M 2G)
.TP
\fB\-H\fR, \fB\-\-si\fR
likewise, but use powers of 1000 not 1024
.TP
\fB\-i\fR, \fB\-\-inodes\fR
list inode information instead of block usage
.TP
\fB\-k\fR
like \fB\-\-block\-size\fR=\fI1K\fR
.TP
\fB\-l\fR, \fB\-\-local\fR
limit listing to local file systems
.TP
\fB\-\-no\-sync\fR
do not invoke sync before getting usage info (default)
.TP
\fB\-P\fR, \fB\-\-portability\fR
use the POSIX output format
.TP
\fB\-\-sync\fR
invoke sync before getting usage info
.TP
\fB\-t\fR, \fB\-\-type\fR=\fITYPE\fR
limit listing to file systems of type TYPE
.TP
\fB\-T\fR, \fB\-\-print\-type\fR
print file system type
.TP
\fB\-x\fR, \fB\-\-exclude\-type\fR=\fITYPE\fR
limit listing to file systems not of type TYPE
.TP
\fB\-v\fR
(ignored)
.TP
\fB\-\-help\fR
display this help and exit
.TP
\fB\-\-version\fR
output version information and exit
.PP
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.
.SH AUTHOR
Written by Torbjorn Granlund, David MacKenzie, and Paul Eggert.
.SH "REPORTING BUGS"
Report bugs to <bug\-coreutils@gnu.org>.
.SH COPYRIGHT
Copyright \(co 2006 Free Software Foundation, Inc.
.br
This is free software.  You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
.SH "SEE ALSO"
The full documentation for
.B df
is maintained as a Texinfo manual.  If the
.B info
and
.B df
programs are properly installed at your site, the command
.IP
.B info df
.PP
should give you access to the complete manual.