Remote Desktop Acess from Ubuntu to Raspberry Pi

1. Install Remote Desktop Protocol (RDP) server at Raspberry Pi

First, we will install Remote Desktop Server at Raspberry Pi.

$ sudo apt-get install xrdp

2. Install Remmina Remote Desktop Client at Ubuntu

Luckily, The Remmina Remote Desktop Client is already bundled with Ubuntu OS. You can use Ubuntu launcher to start the Remmina application or you can just type in remmina in terminal.
If you cannot find the client for any reason, you can just install by

$ sudo apt-add-repository ppa:remmina-ppa-team/remmina-next
$ sudo apt-get update
$ sudo apt-get install remmina remmina-plugin-rdp libfreerdp-plugins-standard

3. Acess Raspberry Pi via GUI way

Once the Remmina Remote Desktop Client is launched, you can

Click > Create a new remote desktop file

At Dialog,

Name > Type- Any Name you want
Group > Type- Any Name you want
Protocol > Choose - RDP-Remote Desktop Protocol
Server > Type- IP Address of Raspberry Pi 
User Name >  Type- User name of Raspberry pi
Password > Type- Login password to Raspberry pi
The Rest Of Items > Just leave it as it is

Then Click > Connect

That’s it.

Example of my client setup.

Name > pi
Group > pi
Protocol > RDP-Remote Desktop Protocol
Server > 192.168.1.104
User Name >  pi
Password > .........

Note: Of course, you can’t see the password. But it is just default password comes with Raspberry Pi.