LOCK(1)LOCK(1)NAMElock - reserve a terminal
SYNOPSISlock [ -number ]
DESCRIPTION
Lock requests a password from the user, reads it again for verification
and then it will normally not relinquish the terminal until the
password is repeated. There are three other conditions under it will
terminate: it accepts the password for root as an alternative to the
one given by the user, it will timeout after some interval of time, and
it may be killed by somebody with the appropriate permission. The
default time limit is 15 minutes but it may be changed with the -number
option where number is the time limit in minutes.
3rd Berkeley Distribution May 7, 1986 LOCK(1)