.\" Copyright (c) 1989, 1990, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)df.1 8.3 (Berkeley) 5/8/95 .\" $FreeBSD: src/bin/df/df.1,v 126.96.36.199 2002/04/22 22:17:36 keramida Exp $ .\" .Dd May 8, 1995 .Dt DF 1 .Os .Sh NAME .Nm df .Nd display free disk space .Sh SYNOPSIS .Nm df .Oo .Fl b | h | H | k | .Fl m | g | P .Oc .Op Fl ailn .Op Fl t .Op Fl T Ar type .Op Ar file | filesystem ... .Sh LEGACY SYNOPSIS .Nm df .Oo .Fl b | h | H | k | .Fl m | P .Oc .Op Fl ailn .Op Fl t Ar type .Op Fl T Ar type .Op Ar file | filesystem ... .Sh DESCRIPTION The .Nm df utility displays statistics about the amount of free disk space on the specified .Ar filesystem or on the filesystem of which .Ar file is a part. Values are displayed in 512-byte per block counts. If neither a file or a filesystem operand is specified, statistics for all mounted filesystems are displayed (subject to the .Fl t option below). .Pp The following options are available: .Bl -tag -width Ds .It Fl a Show all mount points, including those that were mounted with the MNT_IGNORE flag. .It Fl b Use (the default) 512-byte blocks. This is only useful as a way to override an .Ev BLOCKSIZE specification from the environment. .It Fl g Use 1073741824-byte (1-Gbyte) blocks rather than the default. Note that this overrides the .Ev BLOCKSIZE specification from the environment. .It Fl H "Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the number of digits to three or less using base 10 for sizes. .It Fl h "Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and Petabyte in order to reduce the number of digits to three or less using base 2 for sizes. .It Fl i Include statistics on the number of free inodes. This option is now the default to conform to .St -susv3 Use .Fl P to suppress this output. .It Fl k Use 1024-byte (1-Kbyte) blocks, rather than the default. Note that this overrides the .Ev BLOCKSIZE specification from the environment. .It Fl l Only display information about locally-mounted filesystems. .It Fl m Use 1048576-byte (1-Mbyte) blocks rather than the default. Note that this overrides the .Ev BLOCKSIZE specification from the environment. .It Fl n Print out the previously obtained statistics from the filesystems. This option should be used if it is possible that one or more filesystems are in a state such that they will not be able to provide statistics without a long delay. When this option is specified, .Nm df will not request new statistics from the filesystems, but will respond with the possibly stale statistics that were previously obtained. .It Fl P Use (the default) 512-byte blocks. This is only useful as a way to override an .Ev BLOCKSIZE specification from the environment. .It Fl T Only print out statistics for filesystems of the specified types. More than one type may be specified in a comma separated list. The list of filesystem types can be prefixed with .Dq no to specify the filesystem types for which action should .Em not be taken. For example, the .Nm df command: .Bd -literal -offset indent df -T nonfs,mfs .Ed .Pp lists all filesystems except those of type .Tn NFS and .Tn MFS . The .Xr lsvfs 1 command can be used to find out the types of filesystems that are available on the system. .It Fl t If used with no arguments, this option is a no-op (Mac OS X already prints the total allocated-space figures). If used with an argument, it acts like .Fl T , but this usage is deprecated and should not be relied upon. .El .Sh ENVIRONMENT .Bl -tag -width BLOCKSIZE .It Ev BLOCKSIZE If the environment variable .Ev BLOCKSIZE is set, the block counts will be displayed in units of that size block. .El .Sh BUGS The .Fl n and .Fl t flags are ignored if a file or filesystem is specified. .Sh LEGACY DESCRIPTION The "capacity" percentage is normally rounded up to the next higher integer. In legacy mode, it is rounded down to the next lower integer. .Pp When the .Fl P option and the .Fl k option are used together, sizes are reported in 1024-blocks. In legacy mode, when the .Fl P option and .Fl k option are used together, the last option specified dictates the reported block size. .Pp The .Fl t option is normally a no-op (Mac OS X already prints the total allocated-space figures). In legacy mode, it is equivalent to .Fl T . .Pp For more information about legacy mode, see .Xr compat 5 . .Sh SEE ALSO .Xr lsvfs 1 , .Xr quota 1 , .Xr fstatfs 2 , .Xr getfsstat 2 , .Xr statfs 2 , .Xr getmntinfo 3 , .Xr compat 5 , .Xr fstab 5 , .Xr mount 8 , .Xr quot 8 .Sh HISTORY A .Nm df command appeared in .At v1 .