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