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 BSD 4 38.Sh NAME 39.Nm df 40.Nd display free disk space 41.Sh SYNOPSIS 42.Nm df 43.Oo 44.Fl b | h | H | k | 45.Fl m | P 46.Oc 47.Op Fl ain 48.Op Fl t Ar type 49.Op Ar file | Ar filesystem ... 50.Sh DESCRIPTION 51.Nm Df 52displays statistics about the amount of free disk space on the specified 53.Ar filesystem 54or on the filesystem of which 55.Ar file 56is a part. 57Values are displayed in 512-byte per block counts. 58If neither a file or a filesystem operand is specified, 59statistics for all mounted filesystems are displayed 60(subject to the 61.Fl t 62option below). 63.Pp 64The following options are available: 65.Bl -tag -width Ds 66.It Fl a 67Show all mount points, including those that were mounted with the MNT_IGNORE 68flag. 69.It Fl b 70Use 512-byte blocks rather than the default. Note that 71this overrides the 72.Ev BLOCKSIZE 73specification from the environment. 74.It Fl H 75"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, 76Gigabyte, Terabyte and Petabyte in order to reduce the number of 77digits to three or less using base 10 for sizes. 78.It Fl h 79"Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, 80Gigabyte, Terabyte and Petabyte in order to reduce the number of 81digits to three or less using base 2 for sizes. 82.It Fl i 83Include statistics on the number of free inodes. 84.It Fl k 85Use 1024-byte (1-Kbyte) blocks rather than the default. Note that 86this overrides the 87.Ev BLOCKSIZE 88specification from the environment. 89.It Fl m 90Use 1048576-byte (1-Mbyte) blocks rather than the default. Note that 91this overrides the 92.Ev BLOCKSIZE 93specification from the environment. 94.It Fl n 95Print out the previously obtained statistics from the filesystems. 96This option should be used if it is possible that one or more 97filesystems are in a state such that they will not be able to provide 98statistics without a long delay. 99When this option is specified, 100.Nm 101will not request new statistics from the filesystems, but will respond 102with the possibly stale statistics that were previously obtained. 103.It Fl P 104Use POSIX compliant output of 512-byte blocks rather than the default. 105Note that this overrides the 106.Ev BLOCKSIZE 107specification from the environment. 108.It Fl t 109Only print out statistics for filesystems of the specified types. 110More than one type may be specified in a comma separated list. 111The list of filesystem types can be prefixed with 112.Dq no 113to specify the filesystem types for which action should 114.Em not 115be taken. 116For example, the 117.Nm 118command: 119.Bd -literal -offset indent 120df -t nonfs,mfs 121.Ed 122.Pp 123lists all filesystems except those of type 124.Tn NFS 125and 126.Tn MFS . 127The 128.Xr lsvfs 1 129command can be used to find out the types of filesystems 130that are available on the system. 131.El 132.Sh ENVIRONMENT 133.Bl -tag -width BLOCKSIZE 134.It Ev BLOCKSIZE 135If the environment variable 136.Ev BLOCKSIZE 137is set, the block counts will be displayed in units of that size block. 138.El 139.Sh BUGS 140The 141.Fl n 142and 143.Fl t 144flags are ignored if a file or filesystem is specified. 145.Sh SEE ALSO 146.Xr lsvfs 1 , 147.Xr quota 1 , 148.Xr fstatfs 2 , 149.Xr getfsstat 2 , 150.Xr statfs 2 , 151.Xr getmntinfo 3 , 152.Xr fstab 5 , 153.Xr mount 8 , 154.Xr quot 8 155.Sh HISTORY 156A 157.Nm 158command appeared in 159.At v1 . 160