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Is there a way to fix Grub on Ubuntu?
Boot into the USB drive and use the the Linux system to repair GRUB. We have a guide to reinstalling the GRUB2 boot loader on Ubuntu, either with a graphical Boot Repair tool or by using standard Linux terminal commands. You can also just use a dedicated Boot Repair disc to boot straight to the graphical Boot Repair tool.
Why does grub not dual boot with Ubuntu?
If the OSs were installed in different modes, dual booting Windows and Ubuntu with grub can’t work. If your Windows is installed in BIOS mode, it is recommended to install your Ubuntu in BIOS mode, but if it’s installed in UEFI mode, then do the same with Ubuntu.
Why is Ubuntu not booting on my computer?
Boot your computer while holding the Shift key. If you see a menu with a list of operating systems appear, you’ve accessed the GRUB boot loader. If you don’t see a menu with a list of boot options appear, the GRUB boot loader may have been overwritten, preventing Ubuntu from booting.
What to do if you cant boot Ubuntu in legacy mode?
If you have installed Ubuntu in legacy mode on the same drive with GPT partitioning, you can use Boot Repair’s Advanced options to uninstall grub-pc and install grub-efi-amd64. That converts the Ubuntu installation from BIOS boot to UEFI boot, the same firmware as most recently manufactured laptops with Windows pre-installed have.
Why is my computer not booting from GRUB2?
If you can’t boot anything — not even a USB drive or CD — you may need to configure the boot order in your BIOS. If this doesn’t help, there may be a hardware problem with your computer. The first thing to check is whether you can access the GRUB2 boot loader. Boot your computer while holding the Shift key.
Can you boot Ubuntu on a Mac with OS X?
If you’re dual-booting Ubuntu and OS X (or macOS, as it’s been recently re-named) on a Mac, it’s a practical necessity to add something to the boot process. You could rely on Apple’s boot manager to control which OS to boot, and in that case no non-Apple tool would be involved when booting OS X.