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 May 8, 1995 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 MNT_IGNORE 71flag. 72.It Fl b 73Use 512-byte blocks rather than the default. Note that 74this overrides the 75.Ev BLOCKSIZE 76specification from the environment. 77.It Fl g 78Use 1073741824-byte (1-Gbyte) blocks rather than the default. Note that 79this overrides the 80.Ev BLOCKSIZE 81specification from the environment. 82.It Fl H 83"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, 84Gigabyte, Terabyte and Petabyte in order to reduce the number of 85digits to four or fewer using base 10 for sizes. 86.It Fl h 87"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, 88Gigabyte, Terabyte and Petabyte in order to reduce the number of 89digits to four or fewer using base 2 for sizes. 90.It Fl i 91Include statistics on the number of free inodes. 92.It Fl k 93Use 1024-byte (1-Kbyte) blocks rather than the default. Note that 94this overrides the 95.Ev BLOCKSIZE 96specification from the environment. 97.It Fl l 98Only display information about locally-mounted file systems. 99.It Fl m 100Use 1048576-byte (1-Mbyte) blocks rather than the default. Note that 101this overrides the 102.Ev BLOCKSIZE 103specification from the environment. 104.It Fl n 105Print out the previously obtained statistics from the file systems. 106This option should be used if it is possible that one or more 107file systems are in a state such that they will not be able to provide 108statistics without a long delay. 109When this option is specified, 110.Nm 111will not request new statistics from the file systems, but will respond 112with the possibly stale statistics that were previously obtained. 113.It Fl P 114Use POSIX compliant output of 512-byte blocks rather than the default. 115Note that this overrides the 116.Ev BLOCKSIZE 117specification from the environment. 118.It Fl t 119Only print out statistics for file systems of the specified types. 120More than one type may be specified in a comma separated list. 121The list of file system types can be prefixed with 122.Dq no 123to specify the file system types for which action should 124.Em not 125be taken. 126For example, the 127.Nm 128command: 129.Bd -literal -offset indent 130df -t nonfs,nullfs 131.Ed 132.Pp 133lists all file systems except those of type 134.Tn NFS 135and 136.Tn NULLFS . 137The 138.Xr lsvfs 1 139command can be used to find out the types of file systems 140that are available on the system. 141.El 142.Sh ENVIRONMENT 143.Bl -tag -width BLOCKSIZE 144.It Ev BLOCKSIZE 145If the environment variable 146.Ev BLOCKSIZE 147is set, the block counts will be displayed in units of that size block. 148.El 149.Sh SEE ALSO 150.Xr lsvfs 1 , 151.Xr quota 1 , 152.Xr fstatfs 2 , 153.Xr getfsstat 2 , 154.Xr statfs 2 , 155.Xr getmntinfo 3 , 156.Xr fstab 5 , 157.Xr mount 8 , 158.Xr quot 8 159.Sh HISTORY 160A 161.Nm 162command appeared in 163.At v1 . 164.Sh BUGS 165The 166.Fl n 167and 168.Fl t 169flags are ignored if a file or file system is specified. 170