DF(1)                      OpenBSD Reference Manual                      DF(1)

NAME
     df - display free disk space

SYNOPSIS
     df [-hiklnP] [-t type] [[file | file_system] ...]

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 block counts.  If neither a
     file nor a file_system operand is specified, statistics for all mounted
     file systems are displayed (subject to the -l and -t options below).

     The options are as follows:

     -h      "Human-readable" output.  Use unit suffixes: Byte, Kilobyte,
             Megabyte, Gigabyte, Terabyte, Petabyte, Exabyte in order to re-
             duce the number of digits to four or less.

     -i      Include statistics on the number of free inodes.

     -k      By default, all sizes are reported in 512-byte block counts.  The
             -k option causes the numbers to be reported in kilobyte counts.

     -l      Display statistics only about mounted file systems with the
             MNT_LOCAL flag set.  If a non-local file system is given as an
             argument, a warning is issued and no information is given on that
             file system.

     -n      Print out the previously obtained statistics from the file sys-
             tems.  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 sys-
             tems, but will respond with the possibly stale statistics that
             were previously obtained.

     -P      Print out information in a stricter format designed to be parsed
             by portable scripts.

     -t type
             Indicate the actions should only be taken on filesystems of the
             specified type. More than one type may be specified in a comma
             separated list.  The list of filesystem types can be prefixed
             with ``no'' to specify the filesystem types for which action
             should not be taken.  If a file system is given on the command
             line that is not of the specified type, a warning is issued and
             no information is given on that file system.

EXAMPLES
     df -kP /usr

     Output, in a strict format suitable for portable scripts, disk space
     statistics for the /usr file system using kilobyte block sizes.

ENVIRONMENT
     BLOCKSIZE  If the environment variable BLOCKSIZE is set, and the -k op-
                tion is not specified, the block counts will be displayed in
                units of that size block.

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

STANDARDS
     The df utility is compliant with the IEEE Std1003.2-1992 (``POSIX.2'')
     specification.

HISTORY
     A df utility appeared in Version 6 AT&T UNIX.


OpenBSD 2.9                    January 13, 1994                              2
