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Booting from USB only

  • 18-11-2014 10:51PM
    #1
    Bongomc
    Registered Users, Registered Users 2 Posts: 132 ✭✭


    I can only seem to boot up ubuntu with the USB. Theres no grub menu and it boots straight to windows 8.
    I tried the following solution but it didnt work.
    sudo grub-install /dev/sda
    sudo update-grub

    Any ideas ?

    Thanks.


Comments

  • #2
    Knasher
    Registered Users, Registered Users 2 Posts: 2,370 ✭✭✭Knasher


    Can you clarify what you mean a little? Are you trying to install linux onto a USB drive? I assume that if you were at the stage where you were grub-install, you have already been able to boot, and install, linux in some form.

    Just at a guess I'd say that you are working with a UEFI system. You may have to add a pointer to grub manually in the bootloader menu. One thing I would check, is if you do a "sudo fdisk -l /dev/sda" (-l is the switch to list partitions) you should see a partition with the type "EFI System" (and possibly on /dev/sdb also, if you are actually trying to install to USB). If you mount that partition, it should contain a directory called EFI, and a sub directory, one for windows and another for grub.


  • #3
    Bongomc
    Registered Users, Registered Users 2 Posts: 132 ✭✭Bongomc


    Knasher wrote: »
    Can you clarify what you mean a little? Are you trying to install linux onto a USB drive? I assume that if you were at the stage where you were grub-install, you have already been able to boot, and install, linux in some form.

    Just at a guess I'd say that you are working with a UEFI system. You may have to add a pointer to grub manually in the bootloader menu. One thing I would check, is if you do a "sudo fdisk -l /dev/sda" (-l is the switch to list partitions) you should see a partition with the type "EFI System" (and possibly on /dev/sdb also, if you are actually trying to install to USB). If you mount that partition, it should contain a directory called EFI, and a sub directory, one for windows and another for grub.

    It was indeed a UEFI system. I changed that and its fixed now.
    Thanks


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