Ubuntu 20.4 manual ip config

1) cat /etc/netplan/00-installer-config.yaml 

# This is the network config written by 'subiquity'

network:

  ethernets:

    enp0s3:

      dhcp4: no

      addresses: [192.168.0.200/24]

      gateway4: 192.168.0.1  

      nameservers:

              addresses: [8.8.8.8,8.8.4.4]

  version: 2

2) netplan apply

3) ip a