Assigning 2 Permanent IP Addresses In 18.04 Desktop

Question

There are 2 themes of IP addresses on my network:

• 192.168.0.###

• 10.#.#.#

  • 10.1.1.#
  • 10.2.1.#
  • 10.3.1.#
  • ...
  • 10.12.1.#

How do I assign permanent IP addresses to access the services in the 10.#.#.#

I tried:

iface eth0 inet static
address 10.9.1.100/24

Followed by

sudo  systemctl restart NetworkManager.service

Without success. I am using Ubuntu 18.04 desktop and haven't found an answer specific to 18.04

Answer 1

Add another IP-address via a GUI:

• Open the network settings / connection details (the exact steps depend on the desktop environment you are using)
• select the IPv4 tab
  
• click on the Add button
• fill the values you want into the fields
• click on Save