172 lines
5.1 KiB
Groff
172 lines
5.1 KiB
Groff
.\"-
|
|
.\" 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.
|
|
.\" 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
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 22, 2004
|
|
.Dt DF 1
|
|
.Os
|
|
.Sh NAME
|
|
.Nm df
|
|
.Nd display free disk space
|
|
.Sh SYNOPSIS
|
|
.Nm
|
|
.Op Fl b | g | H | h | k | m | P
|
|
.Op Fl aciln
|
|
.Op Fl t Ar type
|
|
.Op Ar file | filesystem ...
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
utility
|
|
displays statistics about the amount of free disk space on the specified
|
|
.Ar file system
|
|
or on the file system of which
|
|
.Ar file
|
|
is a part.
|
|
Values are displayed in 512-byte per block counts.
|
|
If neither a file or a file system operand is specified,
|
|
statistics for all mounted file systems 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 512-byte blocks rather than the default.
|
|
Note that
|
|
this overrides the
|
|
.Ev BLOCKSIZE
|
|
specification from the environment.
|
|
.It Fl c
|
|
Display a grand total.
|
|
.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 four or fewer 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 four or fewer using base 2 for sizes.
|
|
.It Fl i
|
|
Include statistics on the number of free inodes.
|
|
.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 file systems.
|
|
.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 file systems.
|
|
This option should be used if it is possible that one or more
|
|
file systems are in a state such that they will not be able to provide
|
|
statistics without a long delay.
|
|
When this option is specified,
|
|
.Nm
|
|
will not request new statistics from the file systems, but will respond
|
|
with the possibly stale statistics that were previously obtained.
|
|
.It Fl P
|
|
Use POSIX compliant output of 512-byte blocks rather than the default.
|
|
Note that this overrides the
|
|
.Ev BLOCKSIZE
|
|
specification from the environment.
|
|
.It Fl t
|
|
Only print out statistics for file systems of the specified types.
|
|
More than one type may be specified in a comma separated list.
|
|
The list of file system types can be prefixed with
|
|
.Dq no
|
|
to specify the file system types for which action should
|
|
.Em not
|
|
be taken.
|
|
For example, the
|
|
.Nm
|
|
command:
|
|
.Bd -literal -offset indent
|
|
df -t nonfs,nullfs
|
|
.Ed
|
|
.Pp
|
|
lists all file systems except those of type
|
|
.Tn NFS
|
|
and
|
|
.Tn NULLFS .
|
|
The
|
|
.Xr lsvfs 1
|
|
command can be used to find out the types of file systems
|
|
that are available on the system.
|
|
.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 SEE ALSO
|
|
.Xr lsvfs 1 ,
|
|
.Xr quota 1 ,
|
|
.Xr fstatfs 2 ,
|
|
.Xr getfsstat 2 ,
|
|
.Xr statfs 2 ,
|
|
.Xr getmntinfo 3 ,
|
|
.Xr fstab 5 ,
|
|
.Xr mount 8 ,
|
|
.Xr quot 8
|
|
.Sh HISTORY
|
|
A
|
|
.Nm
|
|
command appeared in
|
|
.At v1 .
|
|
.Sh BUGS
|
|
The
|
|
.Fl n
|
|
flag is ignored if a file or file system is specified.
|
|
Also, if a mount
|
|
point is not accessible by the user, it is possible that the file system
|
|
information could be stale.
|