Install on bare metal server.

i7-2600k, 16GB Memory, 128GB SSD, NIC x 3

Create a bootable USB installer using Rufus.{#header1}

Ubuntu 20.04 - Download

Rufus portable

Boot USB media and instalation.

Bridge interface.

If it is an LXC host, make it a bridge.

vi /etc/netplan/99-netplan.yaml
network:
  ethernets:
    enp1s0f0:
      dhcp4: no
      dhcp6: no
    enp1s0f1:
      dhcp4: no
      dhcp6: no
    enp3s0:
      dhcp4: no
      dhcp6: no

  bridges:
    br0:
      interfaces: [enp1s0f0]
      dhcp4: no
      addresses: [192.168.8.43/24]
      parameters:
        stp: false
      dhcp6: yes
    br1:
      interfaces: [enp1s0f1]
      dhcp4: no
      addresses: [192.168.9.43/24]
      parameters:
        stp: false
      dhcp6: yes
    br2:
      interfaces: [enp3s0]
      dhcp4: no
      addresses: [192.168.23.43/24]
      nameservers:
        addresses: [192.168.23.47]
      parameters:
        stp: false
      dhcp6: no
      routes:
        - to: default
          via: 192.168.23.10
        - to: 192.168.24.0/24
          via: 192.168.23.3

  version: 2

Create partition

pvdisplay
vgdisplay

lvcreate -L 5G -n vm ubuntu-vg

# format, mount
mkfs.xfs /dev/mapper/ubuntu--vg-vm
blkid

vi /etc/fstab
UUID="ac5bab6b-a2b5-b25b4af" /vm xfs defaults 0 0

mount -a