Configure IP on Linux

Information required

From the client space, note for each additional IP:

• TheIPv4 address assigned
• The mask (often /32 or bridge provided)
• The gateway if indicated in the panel

Debian / Ubuntu (netplan)

Example in /etc/netplan/50-cloud-init.yaml :

network:
  version: 2
  ethernets:
    eth0:
      addresses:
        - 203.0.113.10/24
        - 203.0.113.50/32
      gateway4: 203.0.113.1

Then: sudo netplan apply

Interface method (legacy)

Add in /etc/network/interfaces.d/ a secondary IP file, or an alias eth0:1 According to your image.

Verification

ip addr show and ping -I 203.0.113.50 8.8.8.8 to confirm that the IP is responding well.