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
|
'\" t
.TH "SYSTEMD\-MACHINE\-ID\-SETUP" "1" "" "systemd 241" "systemd-machine-id-setup"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
systemd-machine-id-setup \- Initialize the machine ID in /etc/machine\-id
.SH "SYNOPSIS"
.HP \w'\fBsystemd\-machine\-id\-setup\fR\ 'u
\fBsystemd\-machine\-id\-setup\fR
.SH "DESCRIPTION"
.PP
\fBsystemd\-machine\-id\-setup\fR
may be used by system installer tools to initialize the machine ID stored in
/etc/machine\-id
at install time, with a provisioned or randomly generated ID\&. See
\fBmachine-id\fR(5)
for more information about this file\&.
.PP
If the tool is invoked without the
\fB\-\-commit\fR
switch,
/etc/machine\-id
is initialized with a valid, new machined ID if it is missing or empty\&. The new machine ID will be acquired in the following fashion:
.sp
.RS 4
.ie n \{\
\h'-04' 1.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 1." 4.2
.\}
If a valid D\-Bus machine ID is already configured for the system, the D\-Bus machine ID is copied and used to initialize the machine ID in
/etc/machine\-id\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 2.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 2." 4.2
.\}
If run inside a KVM virtual machine and a UUID is configured (via the
\fB\-uuid\fR
option), this UUID is used to initialize the machine ID\&. The caller must ensure that the UUID passed is sufficiently unique and is different for every booted instance of the VM\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 3.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 3." 4.2
.\}
Similarly, if run inside a Linux container environment and a UUID is configured for the container, this is used to initialize the machine ID\&. For details, see the documentation of the
\m[blue]\fBContainer Interface\fR\m[]\&\s-2\u[1]\d\s+2\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04' 4.\h'+01'\c
.\}
.el \{\
.sp -1
.IP " 4." 4.2
.\}
Otherwise, a new ID is randomly generated\&.
.RE
.PP
The
\fB\-\-commit\fR
switch may be used to commit a transient machined ID to disk, making it persistent\&. For details, see below\&.
.PP
Use
\fBsystemd-firstboot\fR(1)
to initialize the machine ID on mounted (but not booted) system images\&.
.SH "OPTIONS"
.PP
The following options are understood:
.PP
\fB\-\-root=\fR\fB\fIroot\fR\fR
.RS 4
Takes a directory path as argument\&. All paths operated will be prefixed with the given alternate
\fIroot\fR
path, including the path for
/etc/machine\-id
itself\&.
.RE
.PP
\fB\-\-commit\fR
.RS 4
Commit a transient machine ID to disk\&. This command may be used to convert a transient machine ID into a persistent one\&. A transient machine ID file is one that was bind mounted from a memory file system (usually
"tmpfs") to
/etc/machine\-id
during the early phase of the boot process\&. This may happen because
/etc
is initially read\-only and was missing a valid machine ID file at that point\&.
.sp
This command will execute no operation if
/etc/machine\-id
is not mounted from a memory file system, or if
/etc
is read\-only\&. The command will write the current transient machine ID to disk and unmount the
/etc/machine\-id
mount point in a race\-free manner to ensure that this file is always valid and accessible for other processes\&.
.sp
This command is primarily used by the
\fBsystemd-machine-id-commit.service\fR(8)
early boot service\&.
.RE
.PP
\fB\-\-print\fR
.RS 4
Print the machine ID generated or committed after the operation is complete\&.
.RE
.PP
\fB\-h\fR, \fB\-\-help\fR
.RS 4
Print a short help text and exit\&.
.RE
.PP
\fB\-\-version\fR
.RS 4
Print a short version string and exit\&.
.RE
.SH "EXIT STATUS"
.PP
On success, 0 is returned, a non\-zero failure code otherwise\&.
.SH "SEE ALSO"
.PP
\fBsystemd\fR(1),
\fBmachine-id\fR(5),
\fBsystemd-machine-id-commit.service\fR(8),
\fBdbus-uuidgen\fR(1),
\fBsystemd-firstboot\fR(1)
.SH "NOTES"
.IP " 1." 4
Container Interface
.RS 4
\%https://www.freedesktop.org/wiki/Software/systemd/ContainerInterface
.RE
|
