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LUKS key on USB

From: Christopher Oneal
Subject: LUKS key on USB
Date: Tue, 25 May 2021 11:39:15 +0200
User-agent: Mutt/1.0

Hello all,

currently I have a working LUKS encrypted /boot ( and / for that matter ).
For my other LUKS encrypted filesystems I am switching to using a keyfile on an 
external drive (instead of using a password).
However each time at boot GRUB asks me for the password (which is an excellent 
fallback in this scenario).
But I am wondering, is it possible to use a keyfile on a USB drive, instead of 
using a password, to unlock GRUB at boot?
Thank you in advance.



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