Ubuntu 2022v1 secure boot key rotation and friends

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This is the story of the currently progressing changes to secure boot on Ubuntu and the history of how we got to where we are. taking a step back: how does secure boot on Ubuntu work? Booting on Ubuntu involves three components after the firmware: shim grub linux Each of these is a PE binary signed with a key. The shim is signed by Microsoft’s 3rd party key and embeds a self-signed Canonical…

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