GRUB2 101: How to Access and Use Your Linux Distribution’s Boot LoaderSep 22, 2014, 15:00 (0 Talkback[s])
Ubuntu and practically every other Linux distribution use the GRUB2 boot loader. Unless you have multiple operating systems installed, this bootloader is normally hidden — but it provides options you may sometimes need.
The boot loader is the part of Linux that loads when you first boot up your computer. It normally just boots the Linux kernel, which loads the rest of the operating system — but it also provides a menu with options of its own.
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