LOCK(1) 386BSD Reference Manual LOCK(1)
NAME
lock - reserve a terminal
SYNOPSIS
lock [-p] [-t timeout]
DESCRIPTION
Lock requests a password from the user, reads it again for verification
and then will normally not relinquish the terminal until the password is
repeated. There are two other conditions under which it will terminate:
it will timeout after some interval of time and it may be killed by
someone with the appropriate permission.
Options:
-p A password is not requested, instead the user's current login
password is used.
-t timeout The time limit (default 15 minutes) is changed to timeout
minutes.
HISTORY
The lock command appeared in 3.0BSD.
BSD Experimental July 27, 1991 1