LOCK(1) — Unix Programmer’s Manual
NAME
lock − reserve a terminal
SYNOPSIS
lock
DESCRIPTION
Lock requests a password from the user, then prints "LOCKED" on the screen. It refuses to relinquish the terminal until the password is repeated. A user who forgets the password has no other recourse but to log in elsewhere and kill the lock process.
BUGS
The lock should time out after fifteen minutes.
3rd Berkeley Distribution — 1 August 1985