Updated: 2021/Apr/14


DF(1)                       General Commands Manual                      DF(1)

NAME
     df - display free disk space

SYNOPSIS
     df [-acglnW] [-Ghkm | -ihkm | -Pk] [-t type] [file | file_system ...]

DESCRIPTION
     df 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.  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
     file system is less than minfree.

     The following options are available:

     -a      Show all mount points, including those that were mounted with the
             MNT_IGNORE flag.

     -c      Display a grand total for all shown mount points.

     -G      Display all the fields of the structure(s) returned by
             statvfs(2).  This option cannot be used with the -i or -P
             options, and it is modelled after the Solaris -g option.  This
             option will override the -g, -h, -k, and -m options, as well as
             any setting of BLOCKSIZE.

     -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
             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      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>

             Note that the -i option may not be specified with -P.

     -t type
             Is used to indicate the actions should only be taken on file
             systems of the specified type.  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.  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.

     -W      Print the wedge name instead of the mounted from device for
             wedges.  The wedge name is prefixed with "NAME=" as in fstab(5).
             If the wedge information cannot be obtained for one or more file
             systems, the -W option is silently ignored for those file
             systems.

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), fstatvfs(2), getvfsstat(2), statvfs(2), getbsize(3),
     getmntinfo(3), fs(5), fstab(5), mount(8), quot(8), tunefs(8)

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

NetBSD 9.99                     January 2, 2021                    NetBSD 9.99