df(1BSD) (BSD System Compatibility) df(1BSD)
NAME
df - (BSD) report free disk space on file systems
SYNOPSIS
/usr/ucb/df [-i] [-a] [-t type | file . . . ]
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 the following table. Note
that filesystem names may differ on different architectures.
Filesystem kbytes used avail capacity Mounted on
/dev/root 7445 4714 1986 70% /
/dev/0s10 5148 3279 1868 64% /stand
Note that 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(1M).
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/root
or pathnames, 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.
Options
The options for df are as follows:
-a Reports on all file systems including the uninteresting
ones which have zero total blocks. (For example,
automounter)
-i Report the number of used and free inodes.
-t type
Report on file systems of a given type (for example,
nfs).
Copyright 1994 Novell, Inc. Page 1
df(1BSD) (BSD System Compatibility) df(1BSD)
FILES
/etc/mnttab
List of file systems currently mounted.
REFERENCES
du(1M), quot(1M), tunefs(1M)
Copyright 1994 Novell, Inc. Page 2