GNU GRUB is a boot loader package from the GNU Project.
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10 Facts About GRUB
2.
GRUB is the reference implementation of the Free Software Foundation's Multiboot Specification, which provides a user the choice to boot one of multiple operating systems installed on a computer or select a specific kernel configuration available on a particular operating system's partitions.
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3.
GNU GRUB was developed from a package called the Grand Unified Bootloader .
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4.
GNU GRUB uses the second approach, by understanding the underlying file systems.
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5.
GRUB 2 was written from scratch and intended to replace its predecessor, and is used by a majority of Linux distributions.
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6.
GRUB can be configured to automatically load a specified OS after a user-defined timeout.
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7.
Alternatively, GRUB can pass control of the boot process to another boot loader, using chain loading.
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8.
GNU GRUB is free and open-source software, so several variants have been created.
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9.
StartUp-Manager and GRUB Customizer are graphical configuration editors for Debian-based distributions.
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10.
Strength of GRUB is the wide range of supported platforms, file systems, and operating systems, making it the default choice for distributions and embedded systems.
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