Info: (grub) General boot methods

grub: General boot methods

 
 5.1 How to boot operating systems
 =================================
 
 GRUB has three distinct boot methods: loading an operating system
 directly, using kexec from userspace, and chainloading another
 bootloader.  Generally speaking, the first two are more desirable
 because you don't need to install or maintain other boot loaders and
 GRUB is flexible enough to load an operating system from an arbitrary
 disk/partition.  However, chainloading is sometimes required, as GRUB
 doesn't support all existing operating systems natively.

grub: General boot methods

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