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
|
'\" t
.\" Title: sulogin
.\" Author: Julianne Frances Haugh
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\" Date: 2020-01-23
.\" Manual: 系统管理命令
.\" Source: shadow-utils 4.8.1
.\" Language: Chinese Simplified
.\"
.TH "SULOGIN" "8" "2020-01-23" "shadow\-utils 4\&.8\&.1" "系统管理命令"
.\" -----------------------------------------------------------------
.\" * 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 "名称"
sulogin \- Single\-user login
.SH "SYNTAX"
.PP
\fBsulogin\fR
[\fItty\-device\fR]
.SH "描述"
.PP
The
\fBsulogin\fR
command is invoked by
\fBinit\fR
prior to allowing the user access to the system when in single user mode\&. This feature may only be available on certain systems where
\fBinit\fR
has been modified accordingly, or where the
/etc/inittab
has an entry for a single user login\&.
.PP
The user is prompted
.PP
Type control\-d to proceed with normal startup,
(or give root password for system maintenance):
.PP
Input and output will be performed with the standard file descriptors unless the optional device name argument is provided\&.
.PP
If the user enters the correct root password, a login session is initiated\&. When
\fIEOF\fR
is pressed instead, the system enters multi\-user mode\&.
.PP
After the user exits the single\-user shell, or presses
\fIEOF\fR, the system begins the initialization process required to enter multi\-user mode\&.
.SH "CAVEATS"
.PP
This command can only be used if
\fBinit\fR
has been modified to call
\fBsulogin\fR
instead of
/bin/sh, or if the user has set the
\fIinittab\fR
to support a single user login\&. For example, the line:
.PP
co:s:respawn:/etc/sulogin /dev/console
.PP
should execute the sulogin command in single user mode\&.
.PP
As complete an environment as possible is created\&. However, various devices may be unmounted or uninitialized and many of the user commands may be unavailable or nonfunctional as a result\&.
.SH "配置文件"
.PP
The following configuration variables in
/etc/login\&.defs
change the behavior of this tool:
.PP
\fBENV_HZ\fR (string)
.RS 4
If set, it will be used to define the HZ environment variable when a user login\&. The value must be preceded by
\fIHZ=\fR\&. A common value on Linux is
\fIHZ=100\fR\&.
.RE
.PP
\fBENV_TZ\fR (string)
.RS 4
If set, it will be used to define the TZ environment variable when a user login\&. The value can be the name of a timezone preceded by
\fITZ=\fR
(for example
\fITZ=CST6CDT\fR), or the full path to the file containing the timezone specification (for example
/etc/tzname)\&.
.sp
If a full path is specified but the file does not exist or cannot be read, the default is to use
\fITZ=CST6CDT\fR\&.
.RE
.SH "文件"
.PP
/etc/passwd
.RS 4
用户账户信息。
.RE
.PP
/etc/shadow
.RS 4
安全用户账户信息。
.RE
.SH "参见"
.PP
\fBlogin\fR(1),
\fBsh\fR(1),
\fBinit\fR(8)\&.
|
