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