“end Kernel panic — not syncing : VFS :Unable to mount root fs on unknown—block(0,0)”

Heya,

Here are some additional tips you might want to try,

Once you’re in Rescue Mode, you can try to mount the root filesystem to inspect it.

1. Identify the partitions: Run the following to see available partitions:

lsblk

or

fdisk -l

Mount your root partition: Assuming /dev/sda1 is your root partition (replace with the actual device name), try:

mkdir /mnt/root
mount /dev/sda1 /mnt/root

If you can mount it, inspect the /boot directory to check for any missing files or incorrect symlinks.

Check and Reinstall GRUB

With the root filesystem mounted, you can try reinstalling GRUB. Make sure the /boot directory is intact.

1. Chroot into your Droplet’s root filesystem:

mount --bind /dev /mnt/root/dev
mount --bind /proc /mnt/root/proc
mount --bind /sys /mnt/root/sys
chroot /mnt/root

Reinstall GRUB: Attempt to reinstall GRUB with the following command:

grub-install --target=x86_64-efi --efi-directory=/boot --boot-directory=/boot --bootloader-id=grub

If you’re still encountering failed to get canonical path of 'overlay', it could indicate an issue with the filesystem layout or partition recognition.

After reinstalling GRUB, generate a new GRUB configuration file:

update-grub

Once you’ve completed these steps, unmount the filesystems and reboot the Droplet.

If this doesn’t help you might need to contact DigitalOcean support for further assistance.