1.\" Copyright (c) 1989, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)df.1 8.3 (Berkeley) 5/8/95 33.\" $FreeBSD$ 34.\" 35.Dd May 8, 1995 36.Dt DF 1 37.Os BSD 4 38.Sh NAME 39.Nm df 40.Nd display free disk space 41.Sh SYNOPSIS 42.Nm df 43.Op Fl b | h | H | k | m | P 44.Op Fl ain 45.Op Fl t Ar type 46.Op Ar file | Ar filesystem ... 47.Sh DESCRIPTION 48.Nm Df 49displays statistics about the amount of free disk space on the specified 50.Ar filesystem 51or on the filesystem of which 52.Ar file 53is a part. 54Values are displayed in 512-byte per block counts. 55If neither a file or a filesystem operand is specified, 56statistics for all mounted filesystems are displayed 57(subject to the 58.Fl t 59option below). 60.Pp 61The following options are available: 62.Bl -tag -width Ds 63.It Fl a 64Show all mount points, including those that were mounted with the MNT_IGNORE 65flag. 66.It Fl b 67Use 512-byte blocks rather than the default. Note that 68this overrides the 69.Ev BLOCKSIZE 70specification from the environment. 71.It Fl H 72"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, 73Gigabyte, Terabyte and Petabyte in order to reduce the number of 74digits to three or less using base 10 for sizes. 75.It Fl h 76"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, 77Gigabyte, Terabyte and Petabyte in order to reduce the number of 78digits to three or less using base 2 for sizes. 79.It Fl i 80Include statistics on the number of free inodes. 81.It Fl k 82Use 1024-byte (1-Kbyte) blocks rather than the default. Note that 83this overrides the 84.Ev BLOCKSIZE 85specification from the environment. 86.It Fl m 87Use 1048576-byte (1-Mbyte) blocks rather than the default. Note that 88this overrides the 89.Ev BLOCKSIZE 90specification from the environment. 91.It Fl n 92Print out the previously obtained statistics from the filesystems. 93This option should be used if it is possible that one or more 94filesystems are in a state such that they will not be able to provide 95statistics without a long delay. 96When this option is specified, 97.Nm 98will not request new statistics from the filesystems, but will respond 99with the possibly stale statistics that were previously obtained. 100.It Fl P 101Use POSIX compliant output of 512-byte blocks rather than the default. 102Note that this overrides the 103.Ev BLOCKSIZE 104specification from the environment. 105.It Fl t 106Only print out statistics for filesystems of the specified types. 107More than one type may be specified in a comma separated list. 108The list of filesystem types can be prefixed with 109.Dq no 110to specify the filesystem types for which action should 111.Em not 112be taken. 113For example, the 114.Nm 115command: 116.Bd -literal -offset indent 117df -t nonfs,mfs 118.Ed 119.Pp 120lists all filesystems except those of type 121.Tn NFS 122and 123.Tn MFS . 124The 125.Xr lsvfs 1 126command can be used to find out the types of filesystems 127that are available on the system. 128.El 129.Sh ENVIRONMENT 130.Bl -tag -width BLOCKSIZE 131.It Ev BLOCKSIZE 132If the environment variable 133.Ev BLOCKSIZE 134is set, the block counts will be displayed in units of that size block. 135.El 136.Sh BUGS 137The 138.Fl n 139and 140.Fl t 141flags are ignored if a file or filesystem is specified. 142.Sh SEE ALSO 143.Xr lsvfs 1 , 144.Xr quota 1 , 145.Xr fstatfs 2 , 146.Xr getfsstat 2 , 147.Xr statfs 2 , 148.Xr getmntinfo 3 , 149.Xr fstab 5 , 150.Xr mount 8 , 151.Xr quot 8 152.Sh HISTORY 153A 154.Nm 155command appeared in 156.At v1 . 157