df - display free disk space
df [-hiklnP] [-t type] [[file | file_system] ...]
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.
By default, values are displayed as 512-byte block counts.
If neither a
file nor a file_system operand is specified, statistics for
file systems are displayed (subject to the -l and -t options
The options are as follows:
-h "Human-readable" output. Use unit suffixes: Byte,
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
-k option causes the numbers to be reported in kilobyte counts.
-l Display statistics only about mounted file systems
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
-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
were previously obtained.
-P Print out information in a stricter format designed
to be parsed
by portable scripts.
Indicate the actions should only be taken on file
systems of the
specified type. More than one type may be specified
in a commaseparated
list. The list of file system types can
with ``no'' to specify the file system types for
should not be taken. If a file system is given on
line that is not of the specified type, a warning is
no information is given on that file system.
BLOCKSIZE If the environment variable BLOCKSIZE is set, and
the -h or -k
options are not specified, the block counts will
in units of that size block.
$ df -kP /usr
Output, in a strict format suitable for portable scripts,
statistics for the /usr file system using kilobyte block
quota(1), fstatfs(2), getfsstat(2), statfs(2), getmntinfo(3), fstab(5),
The df utility is compliant with the IEEE Std 1003.2-1992
A df utility appeared in Version 3 AT&T UNIX.
OpenBSD 3.6 January 13, 1994
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