DF(1)

NAME
df - report file system disk space usage

SYNOPSIS
df [OPTION]... [FILE]...

DESCRIPTION
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 (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

--direct
    show statistics for a file instead of mount point

--total
    produce a grand total

-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

-k  like --block-size=1K

-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

-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).

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 df bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report df translation bugs to <http://translationproject.org/team/>

COPYRIGHT
Copyright © 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://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
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 coreutils 'df invocation'

should give you access to the complete manual.