To configure a static IP address on your Ubuntu 18.04 server you need to modify a relevant netplan network configuration file within /etc/netplan/ directory.
For example you might find there a default netplan configuration file called 01-netcfg.yaml or 50-cloud-init.yaml with a following content instructing the networkd deamon to configure your network interface via DHCP:
# This file describes the network interfaces available on your system # For more information, see netplan(5). network: version: 2 renderer: networkd ethernets: enp0s3: dhcp4: yes
To set your network interface enp0s3 to static IP address 192.168.1.222 with gateway 192.168.1.1 and DNS server as 8.8.8.8 and 8.8.4.4 replace the above configuration with the one below.
WARNING:
You must adhere to a correct code indent for each line of the block. In other words the prefix number of spaces for each line is important. Otherwise you may end up with an error message similar to: Invalid YAML at //etc/netplan/01-netcfg.yaml line 7 column 6: did not find expected key
# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
version: 2
renderer: networkd
ethernets:
enp0s3:
dhcp4: yes
Once ready apply changes with:
$ sudo netplan apply
In case you run into some issues execute:
$ sudo netplan --debug apply