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@(#)df.1 6.4 (Berkeley) 03/06/90

C 4 df - disk free df [ -ikn ] [ file | filesystem ... ] Df displays statistics on the amount of free disk space on the filesystem filesystem or on the filesystem of which file is a part. If neither a file or a filesystem is specified, statistics for all mounted filesystems are displayed. The following options are available:

-i Include statistics on the number of free inodes.

-k By default, all reported numbers are in 512-byte blocks. This causes the numbers to be reported in kilobytes.

-n Print out the previously obtained statistics from the filesystems. This option should be used if it is possible that one or more filesystems are in a state such that they will not be able to provide statistics without a long delay. When this option is specified, df will not request new statistics from the filesystems, but will respond with the possibly stale statistics that were previously obtained.

The -n flag is ignored if a file or filesystem is specified. quota(1), statfs(2), fstatfs(2), getfsstat(2), getmntinfo(3), fstab(5), mount(8), quot(8)