Show the network interfaces with the command ip link. In the example below the interface is ens3
sander@linuxsource:~$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000
link/ether 08:00:27:6c:13:63 brd ff:ff:ff:ff:ff:ff
The interface configuration files are stored in the /etc/netplan. There are multiple possibilities that depending on the your setup/OS. Edit one of the following files:
01-netcfg.yaml, 50-cloud-init.yaml, or NN_interfaceName.yaml
If it is an cloudinstance and provisioned with cloudinit, you have to disable it:
sander@linuxsource:~$ sudo nano /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg
network: {config: disabled}
Assign the static ip address by editting the config file. sudo nano /etc/netplan/01-netcfg.yaml
Change it from:
network:
version: 2
renderer: networkd
ethernets:
ens3:
dhcp4: yes
to:
network:
version: 2
renderer: networkd
ethernets:
ens3:
dhcp4: no
addresses:
- 192.168.1.1/24
gateway4: 192.168.1.254
nameservers:
addresses: [8.8.8.8, 8.8.4.4]
Press Control+X and save the file.
Then apply the changes with: sudo netplan apply
Then verify the changes with:
sander@linuxsource:~$ ip addr show dev ens3
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 08:00:27:6c:13:63 brd ff:ff:ff:ff:ff:ff
inet 192.168.1.1/24 brd 192.168.1.255 scope global dynamic ens3
