On 10/13/2014 10:25 AM, Fritz Hudnut wrote: > > On Mon, Oct 13, 2014 at 5:00 AM, > <lubuntu-users-requ...@lists.ubuntu.com > <mailto:lubuntu-users-requ...@lists.ubuntu.com>> wrote: > > Yes you can reinstall GRUB2... > You boot a LiveCD and can reinstall GRUB2 from there > the command grub-install will do it. > You will need: > --bootloader-id=ID > the ID of bootloader. This option is only available on > EFI and > Macs. > I don't entirely know the syntax for installing on the Mac MBR/GPT/EFI > thing... > It is a very odd system Apple uses.... however I think (in theory) you > should install it to the partition, rather than the MBR/GPT thing that > Apple uses... > On a side note: > if you don't want refind/refit: > http://heeris.id.au/2014/ubuntu-plus-mac-pure-efi-boot/ > which is based on: > http://glandium.org/blog/?p=2830 > I have never done this, but it looks really interesting > > > > @Is: > > Appreciate the reply, I'll check it out later, maybe tomorrow . . . in > terms of the "liveCD" . . . I can log in to the system using SG2 . . . > so I can or could run commands in the system. But, as mentioned, > synaptics shows that "Grub2" is installed . . . ??? But, the GRUB > window doesn't show up in the process, and the "windows" disk that > usually has 14.04 also doesn't show up in the OSX boot loader window > with the option key, etc. > > Another question, what or where would I find the "bootloader-id"?? . . > . and, then, what would I do with it?? I get that you are suggesting > "sudo apt-get grub-install"??? But, then are you talking about the > addition of something like "/sda"???? > > I think I ran several of these commands already, running through the > "Boot Repair Disk" and the SG2 list, and one of the Alt install > recovery modes, and the SG2 "find the GRUB CFG file" which took me to > the kernel (recovery) . . . and ran through that . . . . I would need > some exact commands to run . . . happy to try them out . . . . > > I'll take a look at the "pure-efi-boot" stuff when I get to this . . . > don't have the SG2 disk with me at work, or any install disk, etc. > > F > > > > Hey Fritz,
>From the live cd you will need to mount the drive and chroot into it (or at least this is how I'd do it on a non mac) so it will be something like (be sure you have the right sda device use fdisk -l /dev/sda to list some stuff) mount /dev/sda/*X*//mnt mount --bind /dev /mnt/dev mount --bind /sys /mnt/sys mount --bind /proc /mnt/proc chroot /mnt this will then take you into your installed system then run: grub-install /dev/sda update-grub exit PLEASE NOTE: I do not know if you need to run the grub-install command with the/--bootloader-id/ option or not.... I have not actually installed this on an EFI Mac in this way. then *umount* your mounted folders (these are for the computer's actual hardware so the chroot uses the real computer ) note, this says *u*mount not un-mount there is no 'n' umount /mnt/sys umount /mnt/proc umount /mnt/dev umount /mnt There is also this link: http://superuser.com/questions/376470/how-to-reinstall-grub2-efi which may or may not help :) -- Regards
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