[Bug 549682] Re: provide emergency path for when entire initscripts are broken

[Launchpad Bug Tracker]

[Expired for grub2 (Ubuntu) because there has been no activity for 60
days.]

** Changed in: grub2 (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/549682

Title:
  provide emergency path for when entire initscripts are broken

Status in grub2 package in Ubuntu:
  Expired

Bug description:
  Binary package hint: grub-common

  A couple of times I've taken a bad update that rendered the screen
  unusable before the recovery prompt comes up.

  Really fun to start sshd blind so I can remote in from another
  computer and fix it.

  The only other generally working option is to keep a third boot path
  from a known-good kernel that touches no bootscripts.

  My particular solution was to modify /etc/grub.d/10_linux to generate
  the third option. As you can see, it only functions if /etc/init.d
  /emergency-shell exists and is executable. So, to enable, ln -s
  /bin/sh /etc/init.d/emergency-shell and run update-grub.

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