df(1) User Commands df(1)
NAME
df - report file system space usage
SYNOPSIS
df [OPTION]... [FILE]...
DESCRIPTION
This manual page documents the GNU version of df. df displays the
amount of 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. 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 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. This
version of df cannot show the space available on unmounted file
systems, because on most kinds of systems doing so requires non-
portable 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 pseudo, duplicate, inaccessible file systems
-B, --block-size=SIZE
scale sizes by SIZE before printing them; see SIZE format below;
E.g., '-BM' prints sizes in units of 1,048,576 bytes
-h, --human-readable
print sizes in powers of 1024 (e.g., 1023M)
-H, --si
print sizes in powers of 1000 (e.g., 1.1G)
-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)
--output[=FIELD_LIST]
use the output format defined by FIELD_LIST, or print all fields
if FIELD_LIST is omitted
-P, --portability
use the POSIX output format
--sync invoke sync before getting usage info
--total
elide all entries insignificant to available space, and produce
a grand total
-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).
The SIZE argument is an integer and optional unit (example: 10K is
10*1024). Units are K,M,G,T,P,E,Z,Y,R,Q (powers of 1024) or KB,MB,...
(powers of 1000). Binary prefixes can be used, too: KiB=K, MiB=M, and
so on.
FIELD_LIST is a comma-separated list of columns to be included. Valid
field names are: 'source', 'fstype', 'itotal', 'iused', 'iavail',
'ipcent', 'size', 'used', 'avail', 'pcent', 'file' and 'target' (see
info page).
AUTHOR
Written by Torbjorn Granlund, David MacKenzie, and Paul Eggert.
REPORTING BUGS
Report bugs to: bug-coreutils@gnu.org
GNU coreutils home page: <https://www.gnu.org/software/coreutils/>
General help using GNU software: <https://www.gnu.org/gethelp/>
Report any translation bugs to <https://translationproject.org/team/>
COPYRIGHT
Copyright © 2026 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <https://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
Full documentation <https://www.gnu.org/software/coreutils/df>
or available locally via: info '(coreutils) df invocation'
GNU coreutils 9.10 March 2026 df(1)
coreutils 9.10 - Generated Thu Apr 2 07:30:41 CDT 2026