ultrix man page for lock

lock(1) 						      General Commands Manual							   lock(1)

Name
       lock - reserve a terminal

Syntax
       lock

Description
       The command requests a password from the user, then asks you to confirm the password by typing it in again.  The terminal refuses to relin-
       quish the terminal until the password is repeated.  If you forget the password, you must log in elsewhere and kill the lock process.

Restrictions
       Should time out after 15 minutes.

																	   lock(1)