Linux Kubuntu How-to Recover an Upgraded Non Bootable EFI System
The Linux 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.
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Boot System with a Live Kubuntu Same as Your System
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Open a Shell Terminal Emulator Window
Alt+Space > Type “kons” > Return
(Press “Enter” to Execute Commands)
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Eventually to Find the Volume to Mount (LVM or Ordinary Partition)
sudo apt-get install lvm2
lvmdiskscan
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Chrooting into Kubuntu System
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Mounting the Root
sudo su
mount /dev/[sdAX] /mnt/
For Example:
mount /dev/sda2 /mnt/
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Then Only if Boot is in a Separate Partition: Mounting the Boot
mount /dev/[sdaY] /mnt/boot
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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
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Chrooting
chroot /mnt/ /bin/bash
Testing Network Connection:
ping -c 3 google.com
If No Network Connection then Try:
exit
cp /etc/resolv.conf /mnt/etc/resolv.conf
And then Chroot Again!
chroot /mnt/ /bin/bash
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Updating Apt Repos
apt-get update
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Fixing eventual Unresolved Processes
apt-get -f install
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Upgrading System Again
apt-get upgrade
apt-get dist-upgrade
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Reinstalling Grub 2 on Kubuntu EFI Systems:
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Rebooting Kubuntu System
exit
Eventually Eject the Live Kubuntu Media…
reboot now
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