Install Hyper-V guest services on Ubuntu and Debian VM's

Ubuntu:

Add to /etc/initramfs-tools/modules

hv_utils
hv_vmbus
hv_storvsc
hv_blkvsc
hv_netvsc

Install

apt install linux-virtual linux-cloud-tools-virtual linux-tools-virtual

Update initramfs:

update-initramfs -u

Reboot. Done.

Debian:

apt install hyperv-daemons