.\" Copyright (c) 1987, 1990 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" %sccs.include.redist.roff%
.\"
.\"	@(#)lock.1	6.9 (Berkeley) 07/27/91
.\"
.Dd 
.Dt LOCK 1
.Os
.Sh NAME
.Nm lock
.Nd reserve a terminal
.Sh SYNOPSIS
.Nm lock
.Op Fl p
.Op Fl t Ar timeout
.Sh DESCRIPTION
.Nm 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.
.Pp
Options:
.Pp
.Bl -tag -width Fl
.It Fl p
A password is not requested, instead the user's current login password
is used.
.It Fl t Ar timeout 
The time limit (default 15 minutes) is changed to
.Ar timeout
minutes.
.El
.Sh HISTORY
The
.Nm lock
command appeared in
.Bx 3.0 .