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Invoking the grub shell

This chapter documents the grub shell grub. Note that the grub shell is an emulator; it doesn't run under the native environment, so it sometimes does something wrong. Therefore, you shouldn't trust it too much. If there is anything wrong with it, don't hesitate to try the native GRUB environment, especially when it guesses a wrong map between BIOS drives and OS devices.

• Basic usage: How to use the grub shell
• Installation under UNIX: How to install GRUB via grub
• Device map: The map between BIOS drives and OS devices