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LOCK(1) BSD General Commands Manual LOCK(1)
lock -- reserve a terminal
lock [-np] [-t timeout]
lock requests a password from the user, reads it again for verification and then will nor-
mally not relinquish the terminal until the password is repeated. There are two other con-
ditions under which it will terminate: it will timeout after some interval of time and it
may be killed by someone with the appropriate permission.
-n No timeout is used. The terminal will be locked indefinitely or until current
challenge is met.
-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 should enter "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.
-t timeout The time limit (default 15 minutes) is changed to timeout minutes.
The lock command appeared in 3.0BSD.
BSD June 6, 1993 BSD
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