
The first thing you need to do is to enable remote desktop sharing on Ubuntu.

That is beyond the scope of this guide, as it requires modifying the remote desktop network’s firewall settings. If you’re on a different network, you’ll need to set up port forwarding. You will need to be on the same local area network as the remote computer when connecting to a remote desktop using this IP address.

You can find the IP address by right-clicking on the network icon in the upper right corner of the desktop and selecting Connection Information.

Note that you’ll also need the IP address of the computer you want to connect to remotely. Remmina will install all required packages for you to use the remote desktop software.
