EFI support in the kernel

[Volker Wysk]

Hi!!

Am Sonntag, den 26.01.2020, 18:52 +0100 schrieb Volker Wysk:
> Am Sonntag, den 26.01.2020, 09:00 -0500 schrieb Ken D'Ambrosio:
> > On 2020-01-26 08:44, Volker Wysk wrote:
> > > The problem is, I have a new computer, which runs UEFI. My old
> > > one
> > > is
> > > BIOS/non-UEFI. Now I have to migrate my system.
> > > 
> > > I want to avoid to install and configure everything again, from
> > > scratch, because there are many things which I've installed,
> > > which
> > > you
> > > can't install easily with apt. Such as my Wiki, my Nextcloud, my
> > > Dovecot mail server...
> > 
> > Ah, now I understand your problem.  What I would try next time
> > (or, 
> > maybe, this time?) is:
> > * Install the OS on your new system
> > * Boot that system with boot media of some sort
> > * Mount your root partition
> > * Delete everything in it EXCEPT:
> >   - /boot/ hierarchy
> >   - /var/lib/modules/ hierarchy

That's /lib/modules in my installation.

> >   - /etc/fstab

And /etc/crypttab.

> > * Copy everything from your old machine to the new one (but not 
> > overwriting /boot/, /var/lib/modules/ or /etc/fstab -- maybe move
> > them 
> > somewhere safe during copying, then delete the directories from the
> > old 
> > system, and replace them with the backed-up ones)
> > * Reboot, and see what happens!
> > 
> > That just might do the trick.
> 
> It's not that simple - full system encryption is part of the
> equation.
> And with this comes LVM, which is needed when encrypting (the way the
> Ubuntu installer installs it).
> 
> I mostly know how to do it. After booting from my maintenance USB
> stick, I call "cryptsetup luksOpen ..." to set up (de)encryption of
> my
> main partition. After that "vgchange -a y", to activate the volume
> group. Then I can mount the root filesystem from /dev/mapper/ubuntu
> --vg-root. 
> 
> A potential problem is the volume group name, which always gets set
> to
> "ubuntu-vg" by the installer. You can't have two volume groups with
> the
> same name. Meaning, that the volume group of my old system needs to
> be
> renamed with vgrename *before* installing the new system. I haven't
> done this yet.
> 
> I'll try it the way you've proposed. It would be great if this
> worked!

I've tried this, and: IT ACTUALLY WORKS!!!  Thank you very much.


I have my old system back. The only problem is, that my dynamic DNS
doesn't work any longer. This seems to come from the installation
procedure (via Ubuntu-USB-Stick), where I specified "desktop" as my
desktop's name, in spite of getting a message that there is already a
machine named "desktop" in the local network.

Now I have two computers called "desktop" in the web interface of my
router, the older one, with the port forwardings, being inactive. And
the newer one not haveing any port forwardings.

I think the dyndns-failure might be related to the double "desktop"
issue.


Cheeers,
Volker