This question already has an answer here:
I was receiving a message upon booting my Ubuntu installation that the boot drive had exactly 0 bytes left and somewhere else on this forum someone suggested looking at the kernels that were installed. I had about 20. I removed like five of the oldest to see if that would resolve the issue and when I rebooted all I get is this:
error: file '/vmlinuz-4.4.0-59-generic' not found error: you need to load the kernel first
Do I have to reinstall or is there some way to recover from this?