report free disk space on ufs file systems
df [-F ufs]
[generic_options] [-o i]
[directory | special]
are options supported by the generic df command.
displays the amount of disk space occupied by
file systems, the amount of used and available space,
and how much of the file system's total capacity has been used.
Note that the amount of space reported as
used and available
is less than the amount of space in the file system;
this is because the system
reserves a fraction of the space
in the file system to allow its file
system allocation routines to work well.
The amount reserved is typically about 10%;
this may be adjusted using
When all the space on the file system except for this
reserve is in use, only a privileged user can allocate new
files and data blocks to existing files.
When the file system is overallocated in this way,
may report that the file system is more than 100% utilized.
Specifies the ufs-FSType.
File system types can be autodetected so in principle this option
is no longer required. However, df executes faster if
the file system type is specifed rather than having to be
file system specific options.
The available option is:
Report the number of used and free inodes.
May not be used with generic_options.
list of file systems currently mounted
df calculates its results differently for mounted and unmounted
For mounted systems the 10% reserved space mentioned above is
included in the number of blocks used.
For unmounted systems the 10% reservation is not included in
the number of blocks used. The generic -k option displays the free
space as a percentage.
The -b and -e options override the -t option.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004