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: src/bin/df/df.1,v 1.18.2.9 2003/05/07 23:56:14 trhodes Exp $ 34.\" $DragonFly: src/bin/df/df.1,v 1.3 2006/02/17 19:33:30 swildner Exp $ 35.\" 36.Dd June 10, 2009 37.Dt DF 1 38.Os 39.Sh NAME 40.Nm df 41.Nd display free disk space 42.Sh SYNOPSIS 43.Nm 44.Oo 45.Fl b | h | H | k | 46.Fl m | P 47.Oc 48.Op Fl ailn 49.Op Fl t Ar type 50.Op Ar file | filesystem ... 51.Sh DESCRIPTION 52The 53.Nm 54utility 55displays statistics about the amount of free disk space on the specified 56.Ar file system 57or on the file system of which 58.Ar file 59is a part. 60Values are displayed in 512-byte per block counts. 61If neither a file or a file system operand is specified, 62statistics for all mounted file systems are displayed 63(subject to the 64.Fl t 65option below). 66.Pp 67The following options are available: 68.Bl -tag -width Ds 69.It Fl a 70Show all mount points, including those that were mounted with the 71.Cm ignore 72option. 73.It Fl b 74Use 512-byte blocks rather than the default. Note that 75this overrides the 76.Ev BLOCKSIZE 77specification from the environment. 78.It Fl g 79Use 1073741824-byte (1-Gbyte) blocks rather than the default. Note that 80this overrides the 81.Ev BLOCKSIZE 82specification from the environment. 83.It Fl H 84"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, 85Gigabyte, Terabyte and Petabyte in order to reduce the number of 86digits to four or fewer using base 10 for sizes. 87.It Fl h 88"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, 89Gigabyte, Terabyte and Petabyte in order to reduce the number of 90digits to four or fewer using base 2 for sizes. 91.It Fl i 92Include statistics on the number of free inodes. 93.It Fl k 94Use 1024-byte (1-Kbyte) blocks rather than the default. Note that 95this overrides the 96.Ev BLOCKSIZE 97specification from the environment. 98.It Fl l 99Only display information about locally-mounted file systems. 100.It Fl m 101Use 1048576-byte (1-Mbyte) blocks rather than the default. Note that 102this overrides the 103.Ev BLOCKSIZE 104specification from the environment. 105.It Fl n 106Print out the previously obtained statistics from the file systems. 107This option should be used if it is possible that one or more 108file systems are in a state such that they will not be able to provide 109statistics without a long delay. 110When this option is specified, 111.Nm 112will not request new statistics from the file systems, but will respond 113with the possibly stale statistics that were previously obtained. 114.It Fl P 115Use POSIX compliant output of 512-byte blocks rather than the default. 116Note that this overrides the 117.Ev BLOCKSIZE 118specification from the environment. 119.It Fl t 120Only print out statistics for file systems of the specified types. 121More than one type may be specified in a comma separated list. 122The list of file system types can be prefixed with 123.Dq no 124to specify the file system types for which action should 125.Em not 126be taken. 127For example, the 128.Nm 129command: 130.Bd -literal -offset indent 131df -t nonfs,nullfs 132.Ed 133.Pp 134lists all file systems except those of type 135.Tn NFS 136and 137.Tn NULLFS . 138The 139.Xr lsvfs 1 140command can be used to find out the types of file systems 141that are available on the system. 142.El 143.Sh ENVIRONMENT 144.Bl -tag -width BLOCKSIZE 145.It Ev BLOCKSIZE 146If the environment variable 147.Ev BLOCKSIZE 148is set, the block counts will be displayed in units of that size block. 149.El 150.Sh SEE ALSO 151.Xr lsvfs 1 , 152.Xr quota 1 , 153.Xr fstatfs 2 , 154.Xr getfsstat 2 , 155.Xr statfs 2 , 156.Xr getmntinfo 3 , 157.Xr fstab 5 , 158.Xr mount 8 , 159.Xr quot 8 160.Sh HISTORY 161A 162.Nm 163command appeared in 164.At v1 . 165.Sh BUGS 166The 167.Fl n 168and 169.Fl t 170flags are ignored if a file or file system is specified. 171