Re: Device to use with cryptsetup Buster encrypted lvm

[Ulf Volmer <u.volmer@u-v.de>]

On Sun, Oct 04, 2020 at 04:16:33PM +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?

You have to use your underlaying physical device.
This is stored in /etc/crypttab. lsblk may be also helpfull.

And root rights are required for this operation.

Best regards
Ulf