DF linux command manual
DF(1) User Commands DF(1)
df - report filesystem disk space usage
df [OPTION]... [FILE]...
This manual page documents the GNU version of df. df displays the
amount of disk space available on the filesystem containing each file
name argument. If no file name is given, the space available on all
currently mounted filesystems 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 con-
taining a mounted filesystem, df shows the space available on that
filesystem rather than on the filesystem containing the device node
(which is always the root filesystem). This version of df cannot show
the space available on unmounted filesystems, because on most kinds of
systems doing so requires very nonportable intimate knowledge of
Show information about the filesystem on which each FILE resides, or
all filesystems by default.
Mandatory arguments to long options are mandatory for short options
include filesystems having 0 blocks
-B, --block-size=SIZE use SIZE-byte blocks
print sizes in human readable format (e.g., 1K 234M 2G)
likewise, but use powers of 1000 not 1024
list inode information instead of block usage
-k like --block-size=1K
limit listing to local filesystems
do not invoke sync before getting usage info (default)
use the POSIX output format
--sync invoke sync before getting usage info
limit listing to filesystems of type TYPE
print filesystem type
limit listing to filesystems not of type TYPE
--help display this help and exit
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.
Written by Torbjorn Granlund, David MacKenzie, and Paul Eggert.
Report bugs to .
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There
is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
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-
info coreutils df
should give you access to the complete manual.
df (coreutils) 5.2.1 May 2004 DF(1)