sudo apt-get -y install \
bridge-utils cpu-checker libvirt-clients \
libvirt-daemon-system qemu-kvm virt-manager \
virt-top libguestfs-tools virtinst 

# /etc/netplan/[ hostname ]

network:
  version: 2
  ethernets:
    enp3s0:
      dhcp4: false
      dhcp6: false
  bridges:
    kvm_bridge:
      interfaces: [enp3s0]
      dhcp4: false
      addresses: [[ subnet ]]
      nameservers:
        addresses: [[ ip_address ]]
      routes:
        - to: default
          via: [ ip_address ]

sudo netplan try
sudo netplan apply

sudo usermod -aG libvirt $USER
sudo usermod -aG kvm $USER