DF(1) BSD Reference Manual DF(1)NAMEdf - display free disk space
SYNOPSISdf [-iklnP] [-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.
By default, values are displayed as 512-byte 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:
-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 ar-
gument, 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 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.
ENVIRONMENT
BLOCKSIZE If the environment variable BLOCKSIZE is set, and the -k op-
tions are not specified, the block counts will be displayed in
units of that size block.
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.
DIAGNOSTICS
The df utility exits with one of the following values:
0 Successful completion.
>0 An error occurred.
SEE ALSOquota(1), fstatfs(2), getfsstat(2), statfs(2), getmntinfo(3), fstab(5),
mount(8), quot(8)STANDARDS
The df utility is compliant with the IEEE Std 1003.2-1992 ("POSIX.2")
specification.
HISTORY
A df utility appeared in Version 3 AT&T UNIX.
MirOS BSD #10-current January 13, 1994 1
