Kevin

The firmware has to allow it, so if you’ve got physical access to the machine that’s possible. Remote access root, on the other hand, can’t tell the firmware to register new keys as long as it’s configured correctly

Generally yes. For many distros, the kernel signing key is with the distro maintainers and so the package comes with pre-signed kernel images. For distros like Arch and Gentoo, it’s the user’s responsibility to maintain the signing key and sign each updated kernel

Missed opportunity for her to delta outta there instead

I feel like that’d defeat the purpose of having redundancy in case the main instance itself goes down 🤔