DF(1V) USER COMMANDS DF(1V)
NAME
df - report free disk space on file systems
SYNOPSIS
df [ -a ] [ -i ] [ -t type ] [ filesystem... ] [
filename... ]
SYSTEM V SYNOPSIS
/usr/5bin/df [ -t ] [ filesystem... ] [ filename... ]
AVAILABILITY
The System V version of this command is available with the
System V software installation option. Refer to Installing
SunOS 4.1 for information on how to install optional
software.
DESCRIPTION
df displays the amount of disk space occupied by currently
mounted file systems, the amount of used and available
space, and how much of the file system's total capacity has
been used. Used without arguments, df reports on all
mounted file systems, producing something like:
example% df
Filesystem kbytes used avail capacity Mounted on
/dev/ip0a 7445 4714 1986 70% /
/dev/ip0g 42277 35291 2758 93% /usr
Note: used+avail is less than the amount of space in the
file system (kbytes); 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
tunefs(8). When all the space on a file system except for
this reserve is in use, only the super-user can allocate new
files and data blocks to existing files. When a file system
is overallocated in this way, df may report that the file
system is more than 100% utilized.
If arguments to df are disk partitions (for example,
/dev/ip0as or path names, df produces a report on the file
system containing the named file. Thus `df .' shows the
amount of space on the file system containing the current
directory.
SYSTEM V DESCRIPTION
The System V version of df works in the same manner as above
but prints only the amount of available space (in 512 byte
units) and the number of free inodes.
OPTIONS
-a Report on all filesystems including the uninteresting
ones which have zero total blocks. (that is, auto-
mounter)
-i Report the number of used and free inodes. Print `*'
if no information is available.
-t type
Report on filesystems of a given type (for example, nfs
or 4.2).
SYSTEM V OPTIONS
-t Report the total allocated space figures.
FILES
/etc/mtab List of filesystems currently mounted.
SEE ALSO
du(1V), mtab(5), quot(8), tunefs(8)
Sun Release 4.1 Last change: 16 September 1989
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