Saved: Proxmox Linux Header updates caused boot failures

I have been grappling with this for a while - turns out it was something very simple:

grub-mkdevicemap -n update-grub

root@pve:~# grub-mkdevicemap -n root@pve:~# update-grub Generating grub configuration file ... Found linux image: /boot/vmlinuz-2.6.32-39-pve Found initrd image: /boot/initrd.img-2.6.32-39-pve Found memtest86+ image: /boot/memtest86+.bin Found memtest86+ multiboot image: /boot/memtest86+_multiboot.bin done

Some other useful links for Proxmox setup: https://pve.proxmox.com/wiki/Package_repositories And to remove the "No Subscription" messages: https://www.jamescoyle.net/how-to/614-remove-the-proxmox-no-subscription-message