This is an ever evolving script I run on new Ubuntu VMs under Hyper-V.

ubuntu_vm_quickstart.sh

#!/bin/bash

echo "Set Timezone to CST"
timedatectl set-timezone America/Chicago

echo "Update Apt"
apt-get update -qq

echo "Remove Unused Default Packages"
apt-get remove -y --purge snapd cloud-init lxd

echo "Install Azure Kernel and mDNS"
apt-get install -y -qq linux-azure avahi-utils

echo "Apt Autoremove"
apt-get -y autoremove

echo "Apt Upgrade"
apt-get upgrade -y -qq

echo "Alias gs to 'git status'"
grep -qxF "alias gs='git status'" ~/.bashrc || echo "alias gs='git status'" >> ~/.bashrc

echo "Disable IPV6 via GRUB"
sed -i 's/GRUB_CMDLINE_LINUX=""/GRUB_CMDLINE_LINUX="ipv6.disable=1"/' /etc/default/grub
update-grub