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How can I set up multi-booting with GRUB on a USB with a different OS? I want to choose the different OS when I plug in the USB.

  • This is handled by your bios, set your bios boot order to boot the USB > hard drive. – Panther Dec 24 '14 at 2:52
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    If you have grub.cfg on your flash drive you can add as many boot stanza. If from a full install you add entries to 40_custom. If just a grub only boot flash drive you do directly edit grub.cfg (exception to rule that we do not directly edit grub.cfg) help.ubuntu.com/community/MaintenanceFreeCustomGrub2Screen And. help.ubuntu.com/community/Grub2/CustomMenus You can also chain load to MBR on internal drive if desired. – oldfred Dec 24 '14 at 4:41
  • Thank you. oldfred. One more question => When I change my bios boot order and plug in the USB, I need to change the grub.cfg and /etc/fstab each time because the origin /dev/sda changed into /dev/sdb. How to deal with it? – Frank Li Jan 23 '15 at 1:46
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  1. YUMI – Multiboot USB Creator
  2. XBOOT – Multiboot ISO USB Creator (Windows)
  3. SARDU – Multiboot USB Creator (Windows)

http://www.pendrivelinux.com/multiboot-create-a-multiboot-usb-from-linux/

  • Dear BallWarapol, Thank a lot. I will like to try it and share my experience. – Frank Li Jan 23 '15 at 1:47

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