Re: Device to use with cryptsetup Buster encrypted lvm

[john doe <johndoe65534@mail.com>]

On 10/4/2020 4:35 PM, David Wright wrote:
> On Sun 04 Oct 2020 at 16:16:33 (+0200), john doe wrote:
> > I just installed Debian Buster with encrypted LVM.
> >
> > In my fstab file, I have:
> > # <file system> <mount point>   <type>  <options>       <dump>  <pass>
> > /dev/mapper/try02--vg-root /               ext4    errors=remount-ro 0
> >       1
> >
> > I can't figure out what device I should pass to cryptsetup to avoid the
> > below error:
> >
> > $ cryptsetup -v luksAddKey /dev/mapper/try02--vg-root /etc/keys/root.key
> > --key-slot=1
> > Device /dev/mapper/try02--vg-root doesn't exist or access denied.
> > Command failed with code -4 (wrong device or file specified).
> >
> >
> > How can I know what device cryptsetupt will accept?
>
> It looks as if you're trying to add the key to the decrypted device,
> ie the /dev/mapper/ device that gets mounted as /.
> You add keys to the encrypted device, ie the device that contains the
> encrypted filesystem, the argument you used in the command
> # cryptsetup luksFormat <this-device>

The debian -installer has done that for me, I don't understand how I can
get the encrypted device.

--
John Doe