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from: @(#)df.1 8.2 (Berkeley) 1/13/92
$Id: df.1,v 1.8 1995/01/13 23:23:41 mycroft Exp $
.Dd January 13, 1994 .Dt DF 1 .Os BSD 4 .Sh NAME .Nm df .Nd display free disk space .Sh SYNOPSIS .Nm df .Op Fl ikln .Op Fl t Ar type .Op Ar file | Ar file_system ... .Sh DESCRIPTION .Nm Df displays statistics about the amount of free disk space on the specified .Ar file_system or on the file system of which .Ar file is a part. Values are displayed in 512-byte per block block counts. If neither a file or a .Ar file_system operand is specified, statistics for all mounted file systems are displayed (subject to the .Fl l and .Fl t options below).
p The following options are available: l -tag -width Ds t Fl i Include statistics on the number of free inodes. t Fl k By default, all sizes are reported in 512-byte block counts. The .Fl k option causes the numbers to be reported in kilobyte counts. t Fl l Display statistics only about mounted file systems with the MNT_LOCAL flag set. This option is deprecated by the .Fl t local option, and may be removed in a future release. t Fl n Print out the previously obtained statistics from the file systems. This option should be used if it is possible that one or more file systems are in a state such that they will not be able to provide statistics without a long delay. When this option is specified, .Nm df will not request new statistics from the file systems, but will respond with the possibly stale statistics that were previously obtained. t Fl t Only print out statistics for file systems of the specified types. The follow additional types are recognized: all (the default), local (all file systems with the MNT_LOCAL flag set), ro (all file systems with the MNT_RDONLY flag set), and rw (all file systems with the MNT_RDONLY flag clear). The string ``no'' may be prepended to a type to get its complement (e.g. ``nonfs'' to get non-NFS file systems). The first .Fl t option overrides the default, additional such options will add to (or subtract from) the current set of types; e.g. ``df -t ufs -t lfs'' will display statistics for UFS and LFS file systems, and ``df -t local -t nolfs'' will display statistics for all .Dq local file systems except LFS. .El .Sh ENVIRONMENTAL VARIABLES l -tag -width BLOCKSIZE t Ev BLOCKSIZE If the environmental variable .Ev BLOCKSIZE is set, and the .Fl k option is not specified, the block counts will be displayed in units of that size block. .El .Sh SEE ALSO .Xr quota 1 , .Xr statfs 2 , .Xr fstatfs 2 , .Xr getfsstat 2 , .Xr getmntinfo 3 , .Xr fstab 5 , .Xr mount 8 , .Xr quot 8 .Sh HISTORY A .Nm df command appeared in .At v6 .