lock - reserve a terminal
lock [-n] [-p] [-a style] [-t timeout]
lock requests a password from the user, reads it again for
and then will normally not relinquish the terminal until the
repeated. There are two other conditions under which it
it will timeout after some interval of time and it may be
killed by someone
with the appropriate privileges.
The options are as follows:
-n Don't use a timeout value. Terminal will be locked
-p A password is not requested, instead the user's current login
password is used. If the user has an S/Key key,
they may also
use it to unlock the terminal. To do this the user
"s/key" at the unlock ``Key:'' prompt. The user
will then be issued
an S/Key challenge to which they may respond
with a six-word
S/Key one-time password.
The specified BSD Authentication login style (as
/etc/login.conf) will be used to authenticate the
user. If the
particular style requires a challenge/response handshake or a
special prompt, the user may enter the name of the
style to get
the standard prompt for that style.
The time limit (default 15 minutes) is changed to
The lock command appeared in 3.0BSD.
OpenBSD 3.6 June 6, 1993
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