sudo nano /etc/netplan

Where:

• DEVICE_NAME is the actual device name to be configured.
• yes/no is an option to enable or disable dhcp4.
• IP is the IP address for the device.
• NETMASK is the netmask for the IP address.
• GATEWAY is the address for your gateway.
• NAMESERVER is the comma-separated list of DNS nameservers.

Here’s a sample .yaml file:

# This is the network config written by 'subiquity'
network:
  ethernets:
    enp0s3:
       dhcp4: no
       addresses: [192.168.1.230/24]
       gateway4: 192.168.1.1
       nameservers:
          addresses: [8.8.4.4,8.8.8.8]
  version: 2