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in rescue mode you need to: boot your pc from a ubuntu cd type in a terminal: grub-install /dev/sda update-grub


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So you've messed with GRUB. One easy, fool-proof solution (if not the fastest) is to install Boot Repair. Follow their instructions. If you've managed to get a shell prompt, you might be able to run apt-get commands. Or grab an Ubuntu live CD (tricky if this is your only computer), boot from it then live install Boot Repair (see 2nd option paragraph). It ...


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I am reproducing my answer to a similar question. At the grub prompt try these commands: set pager=1 ls Now, suppose the output of ls is: (hd0) (hd0,msdos2) (hd0,msdos1), in order to find the linux root filesystem run: ls (hd0,1)/ which should give you all the files/folders in / such as bin/ boot/ cdrom/ dev/ etc/ home/ lib/ etc. Once this is done ...


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You can try FIX MBR from windows install media. It would remove grub and place windows's boot loader. https://support.microsoft.com/en-us/kb/927392 Bootrec.exe /FixMbr


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In my experience, GRUB can be very difficult to repair once things go "off the rails." You might want to consider using one of the several EFI-based alternatives instead. Most of them require at least some manual configuration, but that's likely to be easier than fixing GRUB. My own rEFInd requires no ongoing maintenance, so if it works initially, it should ...


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As documented in Ubuntu Help! First Run Ubuntu Live CD If internet connectivity available, open a terminal and run these commands: sudo apt-get install lilo sudo lilo -M /dev/sda mbr If no Internet connection: recent versions of Ubuntu include the file /usr/lib/syslinux/mbr.bin which is 440 bytes in length and simply needs to be written to the beginning ...


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It seems I have solved my own problem, albeit through a discredited answer on Ubuntu forums. In fact, the solution is almost laughably easy: holding down the ESC key. No, really, it does work. All you need to do, provided you have an installation disk, is to hold down the ESC key before the GRUB Rescue prompt appears. Then you can directly select your ...



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