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DF(1) NetBSD General Commands Manual DF(1)
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by Kimmo Suominen.
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df -- display free disk space
df [-agklmn] [-G | -i | -P] [-t type] [file | file_system ...]
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 mount points, including those that were mounted with the
-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
-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
-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
-m The -m option causes the numbers to be reported in megabytes
-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>
Note that the -i option may not be specified with -P.
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.
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.
quota(1), fstatvfs(2), getvfsstat(2), statvfs(2), getbsize(3),
getmntinfo(3), fs(5), fstab(5), mount(8), quot(8), tunefs(8)
A df utility appeared in Version 6 AT&T UNIX.
NetBSD 5.0 March 4, 2008 NetBSD 5.0