NAME

df − report free disk space on file systems

SYNOPSIS

df [ −i ] [ −l ] [ filesystem ... ] [ file ... ]

DESCRIPTION

Df prints out the amount (in kilobytes) of free disk space available on the specified filesystem, for example, ‘/dev/rp0a’, or on the filesystem in which the specified file, for example, ‘$HOME’, is contained.  If no file system is specified, the free space on all of the normally mounted file systems is printed. 

OPTIONS

−i Report also the number of used and free inodes. 

−l Also examine the free list, double checking that the summary number in the filesystem superblock is correct. 

EXAMPLE

Here is a sample printout from the df command (and may not necessarily be appropriate to your installation):

% df
FilesystemkbytesusedavailcapacityMounted on
/dev/ip0a 7445 4714198670%/
/dev/ip0g4227735291275893%/usr
%

Note that the figures for ‘used’ and ‘available’ don’t actually add up to the ‘kbytes’ number, and thus the ‘capacity’ figure is not strictly correct.  This is because the operating system does not normally let a file system fill up to 100% capacity, but normally reports the file system as being ‘full’ at around 90% capacity (this is a system-tunable figure).  When a file system fills up, only the super-user can then create new files.  Because of this feature, it is possible to get a report that a file system has more than 100% of its capacity used. 

FILES

/etc/fstablist of normally mounted filesystems

SEE ALSO

du(1), fstab(5), icheck(8), quot(8)

Sun System Release 0.3  —  29 April 1983