NAME
df - report file system disk space usage
SYNOPSIS
df
[OPTION]... [FILE]...
DESCRIPTION
This manual page
documents the GNU version of
R 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 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
-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
--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 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 bugs to <bug-coreutils@gnu.org>.
COPYRIGHT
Copyright 2006 Free Software Foundation, Inc.
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.
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 command
info df
should give you access to the complete manual.
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