NetBSD/bin/df/df.1

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.\" $NetBSD: df.1,v 1.13 1996/12/11 03:48:42 thorpej Exp $
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.\"
.\" Copyright (c) 1989, 1990, 1993
.\" The Regents of the University of California. All rights reserved.
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.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
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.\" 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.
.\"
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.\" @(#)df.1 8.2 (Berkeley) 1/13/92
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.\"
.Dd January 13, 1994
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.Dt DF 1
.Os BSD 4
.Sh NAME
.Nm df
.Nd display free disk space
.Sh SYNOPSIS
.Nm df
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.Op Fl ikln
.Op Fl t Ar type
.Op Ar file | Ar file_system ...
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.Sh DESCRIPTION
.Nm Df
displays statistics about the amount of free disk space on the specified
.Ar file_system
or on the file system of which
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.Ar file
is a part.
Values are displayed in 512-byte per block block counts.
If neither a file or a
.Ar file_system
operand is specified,
statistics for all mounted file systems are displayed
(subject to the
.Fl l
and
.Fl t
options below).
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.Pp
The following options are available:
.Bl -tag -width Ds
.It Fl i
Include statistics on the number of free inodes.
.It Fl k
By default, all sizes are reported in 512-byte block counts.
The
.Fl k
option causes the numbers to be reported in kilobyte counts.
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.It Fl l
Display statistics only about mounted file systems with the MNT_LOCAL
flag set. If a non-local file system is given as an argument, a
warning is issued and no information is given on that file system.
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.It Fl n
Print out the previously obtained statistics from the file systems.
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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
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statistics without a long delay.
When this option is specified,
.Nm df
will not request new statistics from the file systems, but will respond
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with the possibly stale statistics that were previously obtained.
.It Fl t Ar type
Is used to indicate the actions should only be taken on
filesystems of the specified type.
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. If a file system is given on the command line that is not of
the specified type, a warning is issued and no information is given on
that file system.
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.El
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.Sh ENVIRONMENT VARIABLES
.Bl -tag -width BLOCKSIZE
.It Ev BLOCKSIZE
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If the environment variable
.Ev BLOCKSIZE
is set, and the
.Fl k
option is not specified, the block counts will be displayed in units of that
size block.
.El
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.Sh SEE ALSO
.Xr quota 1 ,
.Xr statfs 2 ,
.Xr fstatfs 2 ,
.Xr getfsstat 2 ,
.Xr getmntinfo 3 ,
.Xr fstab 5 ,
.Xr mount 8 ,
.Xr quot 8
.Sh HISTORY
A
.Nm df
utility appeared in
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.At v6 .