DF(1) BSD General Commands Manual DF(1)NAME
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 specify
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.
SEE ALSOquota(1), statfs(2), fstatfs(2), getfsstat(2), getmntinfo(3), fstab(5),
mount(8), quot(8), sysctl(8)HISTORY
A df command appeared in Version 6 AT&T UNIX.
4th Berkeley Distribution May 8, 1995 4th Berkeley Distribution