lock [ password <"password_string"> ]

Lock the keyboard or define a password string. Setting the password and locking the keyboard can only been done at the system console keyboard or in the AutoexecNosFile. The password can not been displayed.

If 'password' is given then <password_string> is saved as the unlock string.
If no parameters are supplied, the keyboard becomes locked when a password was specified earlier.
If the keyboard is locked, the password is requested. If a correct password password_string is supplied, the keyboard becomes unlocked.