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this post was submitted on 21 Jun 2026
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@Hercules My exampled assumed, that you only have a password set on keyslot 0.
LUKS keyslots are starting at 0, so it seems, that you deleted the initial set password.
I hope, you know the other keyslots.
As far I can see, you can specify, which keyslot has to be selected for unlocking the volume key.
More information you can find in the man page.
Just to give you an update. The other keyslot was the key i added earlier for testing which i removed ... So its time for me to copy over a lot of data to another system en recreate the luks volume. Thanks for your help!
@Hercules So it was possible to use one of the other keyslots to open the encryption?
Probably you can test your wanted configuration in a virtual machine with some small virtual drives to avoid any loss of data.
I found it relative difficult to find the correct UUID which had to be used when I setup my system in the past.
No it wasn't. Luckely the luks parition was still mounted on my system so im making a backup, recreating the partiiton and the restoring ...
I found an article from RedHat on how to restore a luks1 partitions keys while it is still mounted but this isn't possible with luks2 :/
@Hercules That was really luck. I hope, that your backup will be successful.
Until now I didn't used it, but probably I will also have a deeper look into luksHeaderBackup.
https://man.archlinux.org/man/cryptsetup-luksHeaderBackup.8.en
https://man.archlinux.org/man/cryptsetup-luksHeaderRestore.8.en