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
|
VLOCK(1) VLOCK(1)
NNAAMMEE
vlock - Virtual Console lock program
SSYYNNOOPPSSIISS
vvlloocckk
vvlloocckk [[ --aa,,----aallll ]] [[ --cc,,----ccuurrrreenntt ]] [[ --hh,,----hheellpp ]] [[
--vv,,----vveerrssiioonn ]]
DDEESSCCRRIIPPTTIIOONN
vvlloocckk is a program to lock one or more sessions on the
Linux console. This is especially useful for Linux
machines which have multiple users with access to the con-
sole. One user may lock his or her session(s) while still
allowing other users to use the system on other virtual
consoles. If desired, the entire console may be locked
and virtual console switching disabled.
By default, only the current VC (virtual console) is
locked. With the --aa,,--aallll option all VCs are locked. The
locked VCs cannot be unlocked without the invoker's pass-
word or the root password. The root password will always
be able to unlock any or all sessions. And, for the para-
noid, vlock makes it a trying experience for those
attempting to guess the password, so unauthorized access
to session(s) is highly unlikely.
Please note that it is entirely possible to completely
lock yourself out of the console with the --aa,,----aallll option
if you cannot remember your password! Unless you are able
to kill vlock by logging in remotely via a serial terminal
or network, a hard reset is the only method of ``unlock-
ing'' the display.
vvlloocckk works for console sessions primarily. However,
there is support for trying to lock non-console sessions
as well, but that support has not been well tested.
OOPPTTIIOONNSS
--aa,,----aallll
Lock all console sessions and disable VC switching.
--cc,,----ccuurrrreenntt
Lock the current session (this is the default).
--hh,,----hheellpp
Print a brief help message.
--vv,,----vveerrssiioonn
Print the version number of vvlloocckk.
Linux User's Manual 16 May 1996 1
VLOCK(1) VLOCK(1)
AAUUTTHHOORR
Michael K. Johnson <johnsonm@redhat.com>
Linux User's Manual 16 May 1996 2
|
