1.\"- 2.\" Copyright (c) 1989, 1990, 1993 3.\" The Regents of the University of California. All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 4. Neither the name of the University nor the names of its contributors 14.\" may be used to endorse or promote products derived from this software 15.\" without specific prior written permission. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.\" @(#)df.1 8.3 (Berkeley) 5/8/95 30.\" $FreeBSD$ 31.\" 32.Dd April 22, 2004 33.Dt DF 1 34.Os 35.Sh NAME 36.Nm df 37.Nd display free disk space 38.Sh SYNOPSIS 39.Nm 40.Op Fl b | g | H | h | k | m | P 41.Op Fl aciln 42.Op Fl t Ar type 43.Op Ar file | filesystem ... 44.Sh DESCRIPTION 45The 46.Nm 47utility 48displays statistics about the amount of free disk space on the specified 49.Ar file system 50or on the file system of which 51.Ar file 52is a part. 53Values are displayed in 512-byte per block counts. 54If neither a file or a file system operand is specified, 55statistics for all mounted file systems are displayed 56(subject to the 57.Fl t 58option below). 59.Pp 60The following options are available: 61.Bl -tag -width Ds 62.It Fl a 63Show all mount points, including those that were mounted with the MNT_IGNORE 64flag. 65.It Fl b 66Use 512-byte blocks rather than the default. 67Note that 68this overrides the 69.Ev BLOCKSIZE 70specification from the environment. 71.It Fl c 72Display a grand total. 73.It Fl g 74Use 1073741824-byte (1-Gbyte) blocks rather than the default. 75Note that 76this overrides the 77.Ev BLOCKSIZE 78specification from the environment. 79.It Fl H 80"Human-readable" output. 81Use unit suffixes: Byte, Kilobyte, Megabyte, 82Gigabyte, Terabyte and Petabyte in order to reduce the number of 83digits to four or fewer using base 10 for sizes. 84.It Fl h 85"Human-readable" output. 86Use unit suffixes: Byte, Kilobyte, Megabyte, 87Gigabyte, Terabyte and Petabyte in order to reduce the number of 88digits to four or fewer using base 2 for sizes. 89.It Fl i 90Include statistics on the number of free inodes. 91.It Fl k 92Use 1024-byte (1-Kbyte) blocks rather than the default. 93Note 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. 101Note 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 168flag is ignored if a file or file system is specified. 169Also, if a mount 170point is not accessible by the user, it is possible that the file system 171information could be stale. 172