This chapter has explained the purpose of boot loaders on a Linux system, and shown how to set up and configure the two most common loader—LILO and GRUB. After reading it you should know how to add an option to start a different operating system at boot time, or use a different Linux kernel. Because a mistake can render the system unbootable, you should also understand the risks involved in reconfiguring your boot loader.
File for device name mappings | When Get from GRUB is selected, the module will use the command grub –-device-map to obtain a list of BIOS disk numbers and their associated Linux device files. This works perfectly, but can be very slow on some systems. The alternative is to have the module read a file containing the disk mappings, usually found at /boot/grub/device.map. This is faster, but if a new hard disk is added to your system, it may not get added to this file depending on how often your Linux distribution updates it. This means that a new disk may not show up in the menus in this module. |
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