Creating an Ubuntu 18.04 Server Foreman

Install

Just do a basic install using ubuntu-18.04.3-live-server-amd64.iso

If your server does not have a floppy, Ubuntu will report errors. This can be prevented by preventing the loading of a floppy driver on the clients:

echo "blacklist floppy" | sudo tee /etc/modprobe.d/blacklist-floppy.conf
sudo rmmod floppy
sudo update-initramfs -u

Create a netplan in /etc/netplans (note that because it's YAML, indentation is important)

network:
  version: 2
  renderer: networkd
  ethernets:
    ens160:
      dhcp4: true

Apply the netplan

sudo netplan apply

Verify that it worked

ifconfig