Can a file be used as a Luks device key?
At least in unsafe places, the file used to unlock the device should be accessible only by the root user, and should be itself stored on an encrypted filesystem, otherwise the encryption becomes useless (is the equivalent of using a big fat lock to protect a door but leaving the key where it can be reached by anyone).
Is there a way to recover the Luks key?
(RHEL 5 caveat: root can extract the master key to a file; however, cryptsetup in RHEL 5 doesn’t support reading the master key to add a new key. Instead, the disk itself will need to be closed and moved to a RHEL 6 or RHEL 7 machine [along with the master key file].)
How to configure LVM & Luks to Autocrypt?
Open /etc/crypttab sdX_crypt is the name of the mapper that is being created. You can use here any name e.g. “music” or “movies” or “sfdsfawe” …. Save and close the file by issuing ctrl-x, enter, enter. Ctrl-x closes nano but first it asks to save the file [yes = enter] and what the name shall be [same name = enter].
How to automatically unlock LUKS encrypted drives using nano?
Save and close the file by issuing ctrl-x, enter, enter. Ctrl-x closes nano but first it asks to save the file [yes = enter] and what the name shall be [same name = enter]. What we have done there actually is telling that /root/keyfile shall be used instead of password entry to unlock the drive.
How to unlock Luks from Grub for Debian Buster?
This document describes a generic way to unlock LUKS devices from GRUB for Debian Buster. There are two alternatives here: Either format an existing /boot partition to LUKS1; or Move /boot to the root file system. The root device (s) needs to use LUKS version 1, but existing LUKS2 devices can be converted (in-place) to LUKS1.
Is there a way to unlock the Luks partition?
However, GRUB2 is (since Jessie) able to unlock LUKS devices with its cryptomount command, which therefore enables encryption of the /boot partition as well: using that feature reduces the amount of plaintext data written to disk.
Is there a way to re format luks1 to LUKS2?
Since the installer creates a separate (plaintext) /boot partition by default in its “encrypted LVM” partitioning method, the simplest solution is arguably to re-format it as LUKS1, especially if the root device is in LUKS2 format.