man/man1b/df.1b

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 df 1B "14 Sep 1992" "SunOS 5.11" "SunOS/BSD Compatibility Package Commands"
 NAME
df - display status of disk space on file systems
 SYNOPSIS

/usr/ucb/df [-a] [-i] [-t type] [filesystem...]
 [filename...]


 DESCRIPTION

The df utility 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.

If arguments to df are 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.
 OPTIONS

The following options are supported:

-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 ufs).


 EXAMPLES

Example 1 Using df

A sample of output for df looks like:

example% df
Filesystem kbytes used avail capacity Mounted on
sparky:/ 7445 4714 1986 70% /
sparky:/usr 42277 35291 2758 93% /usr


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 can be adjusted using tunefs
(see 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
can report that the file system is more than 100% utilized.

 FILES

/etc/mnttab

List of file systems currently mounted


/etc/vfstab

List of default parameters for each file system


 SEE ALSO

du(1), quot(1M), tunefs(1M), mnttab(4),
attributes(5)