[Bug 1652462] Re: No init after do-release-upgrade from 14.04 to 16.04 (kernel panic)

[Hudson Santos]

+1 to hill!!

This worked for me (note that I had a 7th step to update initramfs just
in case):

1. boot your droplet with a Recovery ISO - Like TigerShark from DigitalOcean
2. Network must be configured, either manually or via TigerShark script.
3. $ mount -rw -o remount /dev/vda1 /mnt
4. $ chroot /mnt
5. $ unlink /etc/resolv.conf && echo "nameserver 8.8.8.8" > /etc/resolv.conf
6. $ apt-get install init
7. $ update-initramfs -u

After reboot your system. It will work fine. Enjoy! ;)

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https://bugs.launchpad.net/bugs/1652462

Title:
  No init after do-release-upgrade from 14.04 to 16.04 (kernel panic)

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  I tried to upgrade from an up-to-date and working Ubuntu 14.04 to
  16.04 using do-release-upgrade.  The process seemed to complete
  successfully except for a couple of errors regarding fcitx packages,
  which I choose to ignore and fix later.

  I then proceeded to reboot, but the system hanged during the shutdown
  so I decided to hard reboot.

  However, I was greeted by a kernel panic preceded by straightforward
  error messages :

  run-init: /sbin/init: No such file or directory
  Target filesystem doesn't have requested /sbin/init.
  run-init: /sbin/init: No such file or directory
  run-init: /etc/init: Permission denied
  run-init: /bin/init: No such file or directory
  /bin/sh: 0: Can't open splash
  Kernel panic — not syncing: Attempted to kill init! exitcode=0x00007f00
  etc. (last two lines mentioned for SEO purposes)

  Indeed, these files don't exist.  It seems /var/log/apt/history.log
  doesn't log "do-release-upgrade", so I have no clue about what went
  wrong during the upgrade.

  FWIW, I can keep the laptop in this state for a couple of days and
  check or try whatever is proposed (though I'd rather avoid involving a
  live CD or similar).

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