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df - report file system 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 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. 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.


Show information about the file system on which each FILE resides, or all file systems by

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; e.g., '-BM' prints sizes in units of
1,048,576 bytes; see SIZE format below

-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

do not invoke sync before getting usage info (default)

use the output format defined by FIELD_LIST, or print all fields if FIELD_LIST is

-P, --portability
use the POSIX output format

--sync invoke sync before getting usage info

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

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 (powers of 1024) or KB,MB,... (powers of 1000).

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).

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