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 November 23, 2008 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 acilnT 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 indent 62.It Fl a 63Show all mount points, including those that were mounted with the 64.Dv MNT_IGNORE 65flag. 66.It Fl b 67Use 512-byte blocks rather than the default. 68Note that 69this overrides the 70.Ev BLOCKSIZE 71specification from the environment. 72.It Fl c 73Display a grand total. 74.It Fl g 75Use 1073741824-byte (1-Gbyte) blocks rather than the default. 76Note that 77this overrides the 78.Ev BLOCKSIZE 79specification from the environment. 80.It Fl H 81"Human-readable" output. 82Use unit suffixes: Byte, Kilobyte, Megabyte, 83Gigabyte, Terabyte and Petabyte in order to reduce the number of 84digits to four or fewer using base 10 for sizes. 85.It Fl h 86"Human-readable" output. 87Use 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. 94Note 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. 102Note that 103this overrides the 104.Ev BLOCKSIZE 105specification from the environment. 106.It Fl n 107Print out the previously obtained statistics from the file systems. 108This option should be used if it is possible that one or more 109file systems are in a state such that they will not be able to provide 110statistics without a long delay. 111When this option is specified, 112.Nm 113will not request new statistics from the file systems, but will respond 114with the possibly stale statistics that were previously obtained. 115.It Fl P 116Use POSIX compliant output of 512-byte blocks rather than the default. 117Note that this overrides the 118.Ev BLOCKSIZE 119specification from the environment. 120.It Fl t 121Only print out statistics for file systems of the specified types. 122More than one type may be specified in a comma separated list. 123The list of file system types can be prefixed with 124.Dq no 125to specify the file system types for which action should 126.Em not 127be taken. 128For example, the 129.Nm 130command: 131.Bd -literal -offset indent 132df -t nonfs,nullfs 133.Ed 134.Pp 135lists all file systems except those of type 136.Tn NFS 137and 138.Tn NULLFS . 139The 140.Xr lsvfs 1 141command can be used to find out the types of file systems 142that are available on the system. 143.It Fl T 144Include file system type. 145.El 146.Sh ENVIRONMENT 147.Bl -tag -width BLOCKSIZE 148.It Ev BLOCKSIZE 149If the environment variable 150.Ev BLOCKSIZE 151is set, the block counts will be displayed in units of that size block. 152.El 153.Sh SEE ALSO 154.Xr lsvfs 1 , 155.Xr quota 1 , 156.Xr fstatfs 2 , 157.Xr getfsstat 2 , 158.Xr statfs 2 , 159.Xr getmntinfo 3 , 160.Xr fstab 5 , 161.Xr mount 8 , 162.Xr quot 8 163.Sh HISTORY 164A 165.Nm 166command appeared in 167.At v1 . 168.Sh BUGS 169The 170.Fl n 171flag is ignored if a file or file system is specified. 172Also, if a mount 173point is not accessible by the user, it is possible that the file system 174information could be stale. 175