/
df.1
182 lines (182 loc) · 5.45 KB
/
df.1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
.\" $NetBSD: df.1,v 1.39 2005/11/18 05:04:24 christos Exp $
.\"
.\" 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. 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 8.2 (Berkeley) 1/13/92
.\"
.Dd November 18, 2005
.Dt DF 1
.Os
.Sh NAME
.Nm df
.Nd display free disk space
.Sh SYNOPSIS
.Nm
.Op Fl aghiklmnP
.Op Fl t Ar type
.Op Ar file | Ar file_system ...
.Sh DESCRIPTION
.Nm
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.
By default, all sizes are reported in 512-byte 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).
.Pp
Note that the printed count of available blocks takes
.Va minfree
into account, and thus will be negative when the number of free blocks
on the filesystem is less than
.Va minfree .
.Pp
The following options are available:
.Bl -tag -width Ds
.It Fl a
Show all filesystems.
By default only filesystems mounted with the
.Dv MNT_IGNORE
flag clear are shown.
.It Fl g
The
.Fl g
option causes the numbers to be reported in gigabytes (1024*1024*1024
bytes).
.It Fl h
"Human-readable" output.
Use unit suffixes: Byte, Kilobyte, Megabyte,
Gigabyte, Terabyte, Petabyte, Exabyte in order to reduce the number of
digits to four or less.
.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 kilobytes (1024 bytes).
.It Fl l
Display statistics only about mounted file systems with the
.Dv 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.
.It Fl m
The
.Fl m
option causes the numbers to be reported in megabytes (1024*1024 bytes).
.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
Produce output in the following portable format:
.Pp
If both the
.Fl P
and
.Fl k
option are specified, the output will be preceded by the following header
line, formatted to match the data following it:
.Bd -literal
"Filesystem 1024-blocks Used Available Capacity Mounted on\\n"
.Ed
.Pp
If the
.Fl P
option is specified without the
.Fl k
options, the output will be preceded by the following header line,
formatted to match the data following it:
.Bd -literal
"Filesystem \*[Lt]blksize\*[Gt]-blocks Used Available Capacity Mounted on\\n"
.Ed
.Pp
The header line is followed by data formatted as follows:
.Bd -literal
"%s %d %d %d %d%% %s\\n", \*[Lt]file system name\*[Gt], \*[Lt]total space\*[Gt],
\*[Lt]space used\*[Gt], \*[Lt]space free\*[Gt], \*[Lt]percentage used\*[Gt],
\*[Lt]file system root\*[Gt]
.Ed
.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.
.El
.Sh ENVIRONMENT
.Bl -tag -width BLOCKSIZE
.It Ev BLOCKSIZE
If the environment variable
.Ev BLOCKSIZE
is set, and the
.Fl g ,
.Fl h ,
.Fl k
and
.Fl m
options are not specified, the block counts will be displayed in units of that
size block.
.El
.Sh SEE ALSO
.Xr quota 1 ,
.Xr fstatvfs 2 ,
.Xr getvfsstat 2 ,
.Xr statvfs 2 ,
.Xr getbsize 3 ,
.Xr getmntinfo 3 ,
.Xr fs 5 ,
.Xr fstab 5 ,
.Xr mount 8 ,
.Xr quot 8 ,
.Xr tunefs 8
.Sh HISTORY
A
.Nm
utility appeared in
.At v6 .