On Debian, I have typically changed
/etc/network/interfaces.d/eth0
to read
allow-hotplug eth0
#iface eth0 inet dhcp
iface eth0 inet static
and then edited
/etc/dhcpcd.conf
to end with something like
interface wlan0
metric 303
interface eth0
static ip_address=192.168.1.50/24
static routers=192.168.1.1
static domain_name_servers=192.168.1.1
metric 202
interface eth1
metric 201
How may I do something similar in Ubuntu Server?