File /etc/network/interfaces

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto enp4s0
iface enp4s0 inet static
        address 10.20.10.232
        netmask 255.255.255.0
        network 10.20.10.0
        broadcast 10.20.10.255
        gateway 10.20.10.1
        dns-nameservers 10.20.10.11 10.20.10.10
        dns-domain domain.local
        # dns-* options are implemented by the resolvconf package, if installed