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DF(1)                  DragonFly General Commands Manual                 DF(1)

NAME
     df -- display free disk space

SYNOPSIS
     df [-b | -h | -H | -k | -m | -P] [-ailnT] [-t type]
        [file | filesystem ...]

DESCRIPTION
     The df utility displays statistics about the amount of free disk space on
     the specified file system or on the file system of which file is a part.
     Values are displayed in 512-byte per block counts.  If neither a file or
     a file system operand is specified, statistics for all mounted file
     systems are displayed (subject to the -t option below).

     The following options are available:

     -a      Show all mount points, including those that were mounted with the
             ignore option.

     -b      Use 512-byte blocks rather than the default.  Note that this
             overrides the BLOCKSIZE specification from the environment.

     -g      Use 1073741824-byte (1-Gbyte) blocks rather than the default.
             Note that this overrides the BLOCKSIZE specification from the
             environment.

     -H      "Human-readable" output.  Use unit suffixes: Byte, Kilobyte,
             Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the
             number of digits to four or fewer using base 10 for sizes.

     -h      "Human-readable" output.  Use unit suffixes: Byte, Kilobyte,
             Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the
             number of digits to four or fewer using base 2 for sizes.

     -i      Include statistics on the number of free and used inodes.  In
             conjunction with the -h or -H options, the number of inodes is
             scaled by powers of 1000.

     -k      Use 1024-byte (1-Kbyte) blocks rather than the default.  Note
             that this overrides the BLOCKSIZE specification from the
             environment.

     -l      Only display information about locally-mounted file systems.

     -m      Use 1048576-byte (1-Mbyte) blocks rather than the default.  Note
             that this overrides the BLOCKSIZE specification from the
             environment.

     -n      Print out the previously obtained statistics from the file
             systems.  This option should be used if it is possible that one
             or more file systems are in a state such that they will not be
             able to provide statistics without a long delay.  When this
             option is specified, df will not request new statistics from the
             file systems, but will respond with the possibly stale statistics
             that were previously obtained.

     -P      Use POSIX compliant output of 512-byte blocks rather than the
             default.  Note that this overrides the BLOCKSIZE specification
             from the environment.

     -t      Only print out statistics for file systems of the specified
             types.  More than one type may be specified in a comma separated
             list.  The list of file system types can be prefixed with ``no''
             to specify the file system types for which action should not be
             taken.  For example, the df command:

                   df -t nonfs,null

             lists all file systems except those of type NFS and NULLFS.  The
             lsvfs(1) command can be used to find out the types of file
             systems that are available on the system.

     -T      Include file system type.

ENVIRONMENT
     BLOCKSIZE  If the environment variable BLOCKSIZE is set, the block counts
                will be displayed in units of that size block.

SEE ALSO
     lsvfs(1), quota(1), fstatfs(2), getfsstat(2), statfs(2), getmntinfo(3),
     fstab(5), mount(8), quot(8)

HISTORY
     A df command appeared in Version 1 AT&T UNIX.

BUGS
     The -n and -t flags are ignored if a file or file system is specified.

DragonFly 4.7                   March 17, 2017                   DragonFly 4.7