NAME
DF - Display statistics on free disk space.
SYNTAX
df [ -ikn ] [ -t type ] [ file | file_system ]
ARGUMENTS
-i Includes statistics on the number of free inodes.
-k Causes the numbers to be reported in kilobytes. By
default, all reported numbers are in 512-byte
blocks.
-n Prints out the previously obtained statistics from
all mounted file systems. Use this flag 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 (for example, a
remote file system on a server that has crashed).
When this flag is specified, df does not request
new statistics from the file systems; for some
remote file systems, the statistics displayed may
be too old to be useful.
-t type Displays statistics for the specified file system
type only. If the -t flag is specified and a file
or filesystem is specified, the -t flag is
ignored. Available file system types include the
following:
ufs UNIX File System (Berkeley Fast File
System) (default)
pfs Parallel File System (PFS)
nfs Network File System
If the -t flag is specified and a file or
file_system argument is specified, the -t flag is
ignored.
file Pathname of a file.
file_system
Pathname of a mounted file system.
DESCRIPTION
Using the df command on a PFS file system gives information
about the single disk partition on which the PFS file system
is mounted. The df command does not give information about
how much cumulative space is actually available for PFS file
striping. Use the showfs command to get information about
the cumulative amount of free space in a PFS file system.
If neither a file nor a file system is specified, statistics
for all mounted file systems are displayed.
When file system disk usage exceeds 100% of the allowed
space for users, the df command displays a negative number
of free blocks. The allowed space for users is typically 90%
of disk capacity, with 10% reserved for use by root only.
However, system administrators may specify either less or
more reserved space for use by root.
LIMITATIONS AND WORKAROUNDS
For information about limitations and workarounds, see the
release notes files in /usr/share/release_notes.
SEE ALSO
Commands: du(1), mount(8), showfs(1), quot(8).
Functions: fstatfs(2), getmntinfo(3), getpfsinfo(3),
mount(2), statfs(2), statpfs(3).
Files: fstab(4), pfstab(4).
Acknowledgement and Disclaimer