DF(1) BSD Reference Manual DF(1)
df - display free disk space
df [-in] [-t type] [file | filesystem ...]
Df displays statistics about the amount of free disk space on the speci-
fied filesystem or on the filesystem of which file is a part. Values are
displayed in 512-byte per block block counts. If neither a file or a
filesystem operand is specified, statistics for all mounted filesystems
are displayed (subject to the -t option below).
The following options are available:
-i Include statistics on the number of free inodes.
-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.
-t Only print out statistics for filesystems of the specified types.
More than one type may be specified in a comma separated list.
The list of filesystem types can be prefixed with ``no'' to spec-
ify the filesystem types for which action should not be taken.
For example, the df command:
df -t nonfs,mfs
lists all filesystems except those of type NFS and MFS. The
sysctl(8) command can be used to find out the types of filesys-
tems that are available on the system:
BLOCKSIZE If the environmental variable BLOCKSIZE is set, the block
counts will be displayed in units of that size block.
The -n and -t flags are ignored if a file or filesystem is specified.
quota(1), statfs(2), fstatfs(2), getfsstat(2), getmntinfo(3),
fstab(5), mount(8), quot(8), sysctl(8)
A df command appeared in Version 6 AT&T UNIX.
4th Berkeley Distribution May 8, 1995 1