how to quickly fix missing gpu driver

[homework36]

If for some reason, nvidia driver disappears as it always does on Arbutus (we all hate this!), and if we need to reinstall all the drivers, make sure to Dynamic Kernel Module Support (DKMS) and kernel updates so that dkms can be rebuilt again while installing nvidia-vgpu-kmod:

sudo apt-get purge nvidia-*
sudo rm -rf /var/lib/dkms/nvidia/
sudo rm -rf /lib/modules/$(uname -r)/updates/dkms/nvidia.ko