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DF(1)                   NetBSD General Commands Manual                   DF(1)


NAME

     df -- display free disk space


SYNOPSIS

     df [-aghiklmnP] [-t type] [file | file_system ...]


DESCRIPTION

     df displays statistics about the amount of free disk space on the speci-
     fied file_system or on the file system of which file is a part.  By
     default, all sizes are reported in 512-byte block counts.  If neither a
     file or a file_system operand is specified, statistics for all mounted
     file systems are displayed (subject to the -l and -t options below).

     Note that the printed count of available blocks takes minfree into
     account, and thus will be negative when the number of free blocks on the
     filesystem is less than minfree.

     The following options are available:

     -a      Show all filesystems.  By default only filesystems mounted with
             the MNT_IGNORE flag clear are shown.

     -g      The -g option causes the numbers to be reported in gigabytes
             (1024*1024*1024 bytes).

     -h      "Human-readable" output.  Use unit suffixes: Byte, Kilobyte,
             Megabyte, Gigabyte, Terabyte, Petabyte, Exabyte in order to
             reduce 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 kilobytes (1024
             bytes).

     -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.

     -m      The -m option causes the numbers to be reported in megabytes
             (1024*1024 bytes).

     -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      Produce output in the following portable format:

             If both the -P and -k option are specified, the output will be
             preceded by the following header line, formatted to match the
             data following it:

             "Filesystem 1024-blocks Used Available Capacity Mounted on\n"

             If the -P option is specified without the -k options, the output
             will be preceded by the following header line, formatted to match
             the data following it:

             "Filesystem <blksize>-blocks Used Available Capacity Mounted on\n"

             The header line is followed by data formatted as follows:

             "%s %d %d %d %d%% %s\n", <file system name>, <total space>,
                 <space used>, <space free>, <percentage used>,
                 <file system root>

     -t type
             Is used to indicate the actions should only be taken on filesys-
             tems 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.


ENVIRONMENT

     BLOCKSIZE  If the environment variable BLOCKSIZE is set, and the -g, -h,
                -k and -m options are not specified, the block counts will be
                displayed in units of that size block.


SEE ALSO

     quota(1), fstatfs(2), getfsstat(2), statvfs(2), getbsize(3),
     getmntinfo(3), fs(5), fstab(5), mount(8), quot(8), tunefs(8)


HISTORY

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

NetBSD 3.1.1                    April 18, 2003                    NetBSD 3.1.1