Re: Remove disk encryption in Maintenance Mode

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The encryption defaults changed sometime recently.

The defaults cryptsetup command I had in a script stopped mount my
encrypted filesystem until I  did a bunch of research and found out
what parameters needed to be specified to match the prior default.

If you want to try what I found out reply and I can boot up the
encrypted machine and see what parameters I needed to add.

On Wed, Nov 6, 2024 at 1:48 PM richard emberson <emberson.rich@xxxxxxxxx> wrote:
>
> Thank you for your suggestions.
>
> Keyboard does not look like it is the issue.
>
> I also tried to start the fedora rescue selection, but it also
> required the entry of the LUKS passphrase (Curiously, while a normal
> release starts with a different gui and stops asking for the passphrase
> after 4 or 5 attempts, the rescue selection just keeps asking for the
> passphrase ... maybe forever.)
>
> So, I decided to see if I could get the DVD drive to be recognized by
> the motherboard. When I put a DVD into it and executed from
> Maintenance Mode:
> cat /dev/sr0
> nothing is produced.
> The media server has been quietly sitting in a corner for years.
> Anyway, with a twice over with my small air compressor making
> sure I manually opened the DVD drive and clearing any dust, the
> system then recognize a DVD and I could do an installation:
> installed linuxmint-20.3-xfce-64bit.iso
> then installed Fedora-Xfce-Live-x86_64-41-1.4.iso over the linuxmint
> installation but kept the /boot/efi directory so that
> the installation did an efi installation (not bios).
> I assume this is a trick that is not known by many and as my
> original email said, It was just chance that I guessed it might work.
>
> While there was some stuff in the original /home directory, all of the media
> was on other, non-encrypted drives which I've now been able to mount in
> this new installation.
> Thanks again.
>
>
> On 11/5/24 8:05 PM, Tim via users wrote:
> > On Tue, 2024-11-05 at 18:25 -0800, richard emberson wrote:
> >> Early in Maintenance Mode I tested the keyboard and typed in the passphrase,
> >> twice, and it appeared on the screen correctly.
> >
> > Just to be thorough...  On the graphical login screen see if there's an
> > icon for choosing keyboard layout/language.  It is possible for the
> > command line (purely textual interface) to be different from the
> > graphical interface.
> >
> > You can't remove disc encryption without re-writing every bit of data
> > stored on the disc.  When using an encrypted disc the system is
> > decrypting the data on the fly, it's always encrypted on the disc.
> >
> > Are you sure you want to do that, or simply access the encrypted data?
> >
> > Of course, when it comes to updating an old installation of something
> > with a new version of something else, there is every chance that the
> > old encryption scheme isn't supported any more, so you would have to
> > re-encrypt the drive (or just decrypt it, if you don't want encrypted
> > contents any more).
> >
> > You should probably be booting from something else, and something
> > that's compatible with the original encryption scheme, to do this.  I
> > wouldn't risk trying anything that was going to decrypt in-place when
> > its running from itself, well not if the OS is encrypted.  I'd be more
> > confident about doing that if it's simply user data space that was
> > encrypted.
> >
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