1.\" Copyright (c) 1989, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" %sccs.include.redist.roff% 5.\" 6.\" @(#)df.1 8.3 (Berkeley) 05/08/95 7.\" 8.Dd 9.Dt DF 1 10.Os BSD 4 11.Sh NAME 12.Nm df 13.Nd display free disk space 14.Sh SYNOPSIS 15.Nm df 16.Op Fl in 17.Op Fl t Ar type 18.Op Ar file | Ar filesystem ... 19.Sh DESCRIPTION 20.Nm Df 21displays statistics about the amount of free disk space on the specified 22.Ar filesystem 23or on the filesystem of which 24.Ar file 25is a part. 26Values are displayed in 512-byte per block block counts. 27If neither a file or a filesystem operand is specified, 28statistics for all mounted filesystems are displayed 29(subject to the 30.Fl t 31option below). 32.Pp 33The following options are available: 34.Bl -tag -width Ds 35.It Fl i 36Include statistics on the number of free inodes. 37.It Fl n 38Print out the previously obtained statistics from the filesystems. 39This option should be used if it is possible that one or more 40filesystems are in a state such that they will not be able to provide 41statistics without a long delay. 42When this option is specified, 43.Nm df 44will not request new statistics from the filesystems, but will respond 45with the possibly stale statistics that were previously obtained. 46.It Fl t 47Only print out statistics for filesystems of the specified types. 48More than one type may be specified in a comma separated list. 49The list of filesystem types can be prefixed with 50.Dq no 51to specify the filesystem types for which action should 52.Em not 53be taken. 54For example, the 55.Nm df 56command: 57.Bd -literal -offset indent 58df -t nonfs,mfs 59.Ed 60.Pp 61lists all filesystems except those of type 62.Tn NFS 63and 64.Tn MFS . 65The 66.Xr sysctl 8 67command can be used to find out the types of filesystems 68that are available on the system: 69.Bd -literal -offset indent 70sysctl vfs 71.Ed 72.El 73.Sh ENVIRONMENTAL VARIABLES 74.Bl -tag -width BLOCKSIZE 75.It Ev BLOCKSIZE 76If the environmental variable 77.Ev BLOCKSIZE 78is set, the block counts will be displayed in units of that size block. 79.El 80.Sh BUGS 81The 82.Fl n 83and 84.Fl t 85flags are ignored if a file or filesystem is specified. 86.Sh SEE ALSO 87.Xr quota 1 , 88.Xr statfs 2 , 89.Xr fstatfs 2 , 90.Xr getfsstat 2 , 91.Xr getmntinfo 3 , 92.Xr fstab 5 , 93.Xr mount 8 , 94.Xr quot 8 , 95.Xr sysctl 8 96.Sh HISTORY 97A 98.Nm df 99command appeared in 100.At v6 . 101