I meant to add this in my preceding comment.
This is an example implementation of signed kernel and initramfs for Ubuntu: https://github.com/Phant0mas/ubuntu-secure-boot
Unsure if it works with 18.04, but this method could be implemented natively.
I meant to add this in my preceding comment.
This is an example implementation of signed kernel and initramfs for Ubuntu: https:/ /github. com/Phant0mas/ ubuntu- secure- boot
Unsure if it works with 18.04, but this method could be implemented natively.