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Published on Mar 17, 2012
More videos like this at http://www.theurbanpenguin.com This week we are are 5 weeks into the schedule and we take a look at the GRUB bootloader, or the Grand Unified Bootloader. Using openSUSE the configuration for this is /boot/grub/menu.lst. The bootloader allows us to select the OS and any kernel options. We can add entries into the menu and, should we wish, delete entries. We will also look at securing the GRUB menu with a password, this way you can only select from menu items and not append additional kernel options. The risk of this is highlighted by booting with the init=/bin/bash; this gives us root access with need of a password. Adding the grub password and encrypting it with grub-md5-crypt will prevent this.