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To boot from Ubuntu Live USB menu entry in /etc/grub.d/40_custom should look like that ( Replace DRIVE_UUID with your partition’s uuid ): Thanks for contributing an answer to Ask Ubuntu! Please be sure to answer the question. Provide details and share your research!
Can a dual book boot into a GRUB2?
I am using dual book with grub2 on windows HDD. It detects both windows and linux and offers me a menu to select an os to boot into. For advance configuration , chainloading , and adding maunal entries to grub , follow this link: In some cases, the drivemap command will not work as expected.
Can a Linux boot from a GRUB2 bootloader?
I normally write grub.cfg manually and never use update-grub and have a so called master Grub2 bootloader where i choose from where to boot from, then i let each linux distro to install its own bootloader on its own root partition, so linux can edit its own bootloader without touching my master grub2 bootloader.
Why does grub not boot to another hard disk?
For advance configuration , chainloading , and adding maunal entries to grub , follow this link: In some cases, the drivemap command will not work as expected. For example, in my case I have Windows 7 and a couple Linuxes on sda, and another Windows on sdb.
By default, GRUB will show the menu if there is a second operating system installed. If only Ubuntu is installed, then GRUB will generally load Ubuntu without showing the menu. To reconfigure GRUB to always show a menu:
What kind of boot drive does Grub use?
Boot drive with grub is always hd0, but then other drives are in BIOS reported order which may vary. While above works, I find the drive may change when plugging in a flash drive or any other USB device. So I am converting to use labels. I found out how to use the UUID of the drive, useful if you have multiple drives plugged in at boot time.
What kind of boot drive does Ubuntu use?
Ubuntu installs links in / (root) to boot the most recent install. Adjust example below if necessary to your drive & partition. Boot drive with grub is always hd0, but then other drives are in BIOS reported order which may vary. While above works, I find the drive may change when plugging in a flash drive or any other USB device.