18.04 Trying to Emulate



The blank server starts with Ubuntu 14.04
I found a youtube tutorial upgrading to 18.04, I would like to emulate what’s available on AWS free tier as close as possible.
But the command reboot doesn’t seem to have any effect.
What am I missing, is there a way to upgrade to 18.04 or is there a better way to match the AWS free tier environment? all the tutorials say don’t do this in production, so I just want to practice in a secure environment first without wrecking my home system. Docker and the Linux SubSystem on Windows 10 both have differences from what documentation has told me to expect in the Bionic build mostly with setting hostname and ip addresses.
sudo hostnamectl , systemd or netplan ?