boot issues after restoring a backup

[John Hupp]

On 7/1/2015 1:40 AM, Petter Adsen wrote:
> On Tue, 30 Jun 2015 10:54:11 -0700
> scar <scar at drigon.com> wrote:
>
>> Petter Adsen wrote on 06/29/2015 11:21 PM:
>>> I see now that you got it running, but I'll guess that your problem
>>> was that you had not updated the initramfs after setting the right
>>> UUIDs.
>> yeah thanks, but can you tell me more about this?  i would ideally
>> like to be able to just restore all of / without having to do much
>> else.  so suppose i just restore all of /, then what?  i would need
>> to update /etc/fstab and /etc/crypttab with correct values?  but how
>> do i update initramfs?  is that update-grub or what?  it seems there
>> would be a guide somewhere for this sort of system restore but i
>> can't seem to find anything....
> You can start with update-initramfs(8), the man page should be a good
> place to begin. "apropos" is your friend. From what I understand, the
> initramfs has a copy of crypttab, I would guess that after you had
> changed it to contain the new UUID, the copy in the initramfs still had
> the old version. Updating it would fix that.
>
> If the UUIDs have changed after a restore, you would need to fix that
> in /etc/crypttab, and also /etc/fstab if any devices are referred to by
> UUID there. After setting the correct values you would update the
> initramfs and grub. I'm not saying that this is all you need to do,
> that would depend on your backup and restore procedures, but it's a
> start.
>
> If you want a simpler procedure, maybe Clonezilla would be a good idea
> - I haven't used it, so I can't really say.
>
> Petter

I've had good success with Clonezilla as an imaging tool.