MirBSD manpage: df(1)
DF(1) BSD Reference Manual DF(1)
df - display free disk space
df [-iklnP] [-t type] [[file | filesystem] ...]
The df utility displays statistics about the amount of free disk space on
the specified filesystem or on the filesystem of which file is a part. By
default, values are displayed as 512-byte block counts. If neither a file
nor a filesystem operand is specified, statistics for all mounted
filesystems 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 filesystems with the
MNT_LOCAL flag set. If a non-local filesystem is given as an ar-
gument, a warning is issued and no information is given on that
filesystem.
-n Print out the previously obtained statistics from the filesys-
tems. This option should be used if it is possible that one or
more filesystems 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 filesys-
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 filesystems 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 filesystem is given on the command line that is
not of the specified type, a warning is issued and no information
is given on that filesystem.
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.
$ df -kP /usr
Output, in a strict format suitable for portable scripts, disk space
statistics for the /usr filesystem using kilobyte block sizes.
The df utility exits with one of the following values:
0 Successful completion.
>0 An error occurred.
quota(1), fstatfs(2), getfsstat(2), statfs(2), getmntinfo(3), fstab(5),
mount(8), quot(8)
The df utility is compliant with the IEEE Std 1003.2-1992 ("POSIX.2")
specification.
A df utility appeared in Version 3 AT&T UNIX.
MirBSD #10-current January 13, 1994 1