.\" Copyright (c) 1987, 1990 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" %sccs.include.redist.man%
.\"
.\"     @(#)lock.1	6.6 (Berkeley) %G%
.\"
.Dd 
.Dt LOCK 1
.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.
.Po
Options:
.Pp
.Tw Fl
.Tc Fl t
.Ws
.Ar timeout
.Cx
The time limit (default 15 minutes) is changed to
.Ar timeout
minutes.
.Tp Fl p
Causes
.Nm lock
to use the user's current password instead of requesting another one.
.Tp
.Sh HISTORY
.Nm Lock
appeared in 3 BSD.