NAME
df —
display free disk space
SYNOPSIS
df |
[-in] [-t
type] [file |
filesystem ...] |
DESCRIPTION
Df displays statistics about the amount of free disk
space on the specified 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 filesystems. 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,
dfwill not request new statistics from the filesystems, 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
dfcommand: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 filesystems that are available on the system:
sysctl vfs
ENVIRONMENTAL VARIABLES
BLOCKSIZE- If the environmental variable
BLOCKSIZEis set, the block counts will be displayed in units of that size block.
BUGS
The -n and -t
flags are ignored if a file or filesystem is specified.
SEE ALSO
quota(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.