On Wed, 15 Jun 2016 02:25:45 +0200
<emninger@???> wrote:

> But now there is another problem: Seems there are lost all the shadow
> passwords, both, for root and user. Is there a way to re-establish
> them?

Hallo Emninger,

if you have the installer-disk handy, boot to rescue mode (chroot) and
just use 'passwd'. If you want to use another boot disk and chroot
manually, you'll need to make sure that it has a kernel from the same
branch.

libre Grüße,

Florian