How to Recover After Upgrade a Non Bootable Kubuntu 15.04-14.10-14.04 GNU/Linux on EFI Systems

May 4, 2015 | By the+gnu+linux+evangelist | Filed in: Tutorial.

Linux Kubuntu How to Recover an Upgraded Non Bootable EFI System

You are Welcome! The Tutorial Shows You Step-by-Step How to Try a Generic Recovery for a Non Bootable EFI Kubuntu 14.04-Trusty/14.10-Utopic/15.04-Vivid i386/amd64 GNU/Linux System After Upgrade.

Take into account that for an Upgraded Kubuntu EFI System Recovery a Grub 2 Bootloader Re-Installation May be Needed.

Ubuntu 14.04 Trusty LTS Recovering a Non Bootable System After System Upgrade
  1. Boot System with a Live Kubuntu Same as Your System

    Burninging Kubuntu Live
  2. Open a Shell Terminal Emulator Window
    Alt+Space > Type “kons” > Return
    (Press “Enter” to Execute Commands)

    Fixing Non Bootable Kubuntu 14.04 Trusty LTS after Upgrade - Open Terminal
  3. Possibly to Find the Volume to Fix (LVM or Ordinary Partition)

    sudo apt-get install lvm2

    So now Execute a Disk Scan to Find out existing Partitions:


    In the Output you should be able to Recognize your Device…

  4. Chrooting into Kubuntu System.

    1. Mounting the Root

      sudo su
      mount /dev/[sdAX] /mnt/

      For Example:

      mount /dev/sda2 /mnt/
    2. Then Only if Boot is in a Separate Partition: Mounting the Boot

      mount /dev/[sdaY] /mnt/boot
    3. Mounting Proc,Dev & Sys

      mount -t proc none /mnt/proc
      mount -o bind /dev /mnt/dev
      mount -t devpts none /mnt/dev/pts
      mount -o bind /sys /mnt/sys
    4. Chrooting

      chroot /mnt/ /bin/bash

      Testing Network Connection:

      ping -c 3

      If No Network Connection then Try:

      cp /etc/resolv.conf /mnt/etc/resolv.conf

      And then Chroot Again!

      chroot /mnt/ /bin/bash
  5. Updating Apt Repos

    apt-get update
  6. Fixing potential Unresolved Processes

    apt-get -f install
  7. Upgrading System Again

    apt-get upgrade
    apt-get dist-upgrade
  8. Reinstalling Grub 2 on Kubuntu EFI Systems

    Ubuntu Grub 2 EFI Fixing Guide
  9. Rebooting Kubuntu System


    Possibly Eject the Live Kubuntu Media…

    reboot now

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