I looked up "How to create a custom kernel on the web and it led me to www.kernel.org. Following instructions, I downloaded and configured (with a fair amount of effort), linux-5.10.15. I forgot to add the trailing stuff after the “linux-5.10.15”. To my delight, my configuration eventually worked, and I got to the point of having done a “make install”, and there it was in my boot directory, vmlinuz->linux-5.10.15.
I was trying to figure out grub2 just enough to add a new kernel, and not making any headway. Along comes dnfdragora-updater, which automatically installed a new kernel as well as “my” kernel, linux-5.10.15.
When I tried to kick off my kernel, I got the error message, "invalid signature, can’t run kernel, and back to the grub menu.
My current questions are: How do I remove a kernel from grub2 menu? How do I create a kernel that has a valid signature so it will run? And finally, isn’t there some way to manipulate grub2 so that I can just install a kernel to the list?
I have tried to do my research, but much of the “advice” I run across is very dated, talking about the linux 2.x kernel.
I used to compile kernels, but they didn’t require signatures, and I could use just a few grub commands directly from the grub> prompt to install a new kernel.
I’d appreciate advice, but I know the part about actually configuring and compiling the kernel and modules, it’s the signature and grub2 that have me kerfuffled.