2 list the configuration options available for updating the os
(As always, we recommend to use group-based configuration).By default, this parameter will have the value of "no setting" which means that no updating will take place.
It can also limit access to specific entries for specific users, and can encrypt plain-text passwords for increased security.
Please refer to the Grub2/Passwords community documentation.
GRUB 2 provides excellent capabilities for troubleshooting and correcting boot problems from the boot menu or GRUB 2 terminal.
GRUB 2's method of building the GRUB menu is vastly different from GRUB 0.97.
This page describes the new file structure and details how to the user can change the default settings used to create the boot menu.