3 VV VV LL OOO CCCCC KK KK
4 VV VV LL OO OO CC KK KK originally written by
5 VV VV LL OO OO CC KK Michael K. Johnson
6 VV VV LL OO OO CC KK KK for Linux Journal
7 VVV LLLLLLLL OOO CCCCC KK KK
10 This is vlock, the Linux _V_irtual Console locking program. It
11 allows you to lock one or all of the sessions of your Linux console
14 Usage is very simple; by default, vlock locks the single console
15 you are on. The -a or --all flags cause it to lock the console
16 completely, so that users cannot switch to another virtual
19 If you are working on a shared Linux computer, and want to lock
20 a console session as you left it, but want to allow other users
21 to log onto other sessions, simply run vlock when you leave the
24 If you want to lock the console so that no one else can log onto
25 any of the virtual consoles (perhaps because you have login sessions
26 running on several other virtual consoles at the same time), you
27 use the -a or --all flag to cause vlock to not allow any user
28 to switch to any console without typing your password.
30 WARNING: If you lock all the consoles, they will be *really*
31 locked. Unless you have a serial terminal, or can log in
32 remotely via a network to kill vlock, you *will not* be able
33 to get back to your terminal session without entering the
34 correct password. If you loose data because you have to reset
35 your computer because of vlock -a, it is your own problem,
36 not mine. I warned you.
38 The root password will *always* be able to unlock any vlock
41 vlock consists of several binaries some of which have to be installed
42 as setuid root to function correctly. Please refer to SECURITY for a
45 "vlock -h" or "vlock --help" will get you a help message.
47 To run vlock on a new VC, use the -n or --new flag. If installed with
48 proper permissions this even works from an X11 session.
50 vlock is maintained by Frank Benkstein <frank-vlock@benkstein.net>.
52 .. [1] This is a compile time option and can be disabled with the
53 USE_ROOT_PASS compile flag.