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LOCK(1)			  BSD General Commands Manual		       LOCK(1)

NAME
     lock — reserve a terminal

SYNOPSIS
     lock [-npv] [-t timeout]

DESCRIPTION
     The lock utility 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:

     -n		 Don't use a timeout value.  Terminal will be locked forever.

     -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.

     -v		 Disable switching virtual terminals while this terminal is
		 locked.  This option is implemented in a way similar to the
		 -S option of vidcontrol(1), and is only available if the ter‐
		 minal in question is a syscons(4) virtual terminal.

HISTORY
     The lock command appeared in 3.0BSD.

BSD				 July 10, 2002				   BSD

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