Objective
The following tutorial will explain how to setup client/server remote desktop sharing on Ubuntu 18.04 Bionic Beaver.Operating System and Software Versions
- Operating System: - Ubuntu 18.04 Bionic Beaver
Requirements
Privileged access to your Ubuntu System as root or viasudo command is required. Difficulty
EASYConventions
- # - requires given linux commands to be executed with root privileges either directly as a root user or by use of
sudocommand - $ - requires given linux commands to be executed as a regular non-privileged user
Instructions
Enable Remote Desktop Sharing
To begin, we first need to make sure that remote desktop sharing is installed on the target Ubuntu system:$ sudo apt update && sudo apt install -y vinoNext, step is to enable remote sharing:
Use
Activities menu to search for Sharing as part of System settings section. Alternately, execute the command gnome-control-center sharing to bring up remote desktop sharing settings window.
Click on
Screen Sharing to begin the remote desktop configuration. 
Make sure that all switches are set to
The
ON. In case you have multiple Networks select which network will be used for remote desktop sharing. Set password if necessary. The
Allow connections to control the screen option gives a remote user the ability to actively interact with a remote desktop. If this option is NOT ticked, the remote desktop session will be set as read-only.5900.Open up terminal and enter:
$ ss -lnt
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 5 127.0.0.1:631 0.0.0.0:*
LISTEN 0 128 127.0.0.1:6010 0.0.0.0:*
LISTEN 0 128 0.0.0.0:38299 0.0.0.0:*
LISTEN 0 5 0.0.0.0:5900 0.0.0.0:*
LISTEN 0 128 [::]:22 [::]:*
LISTEN 0 5 [::1]:631 [::]:*
LISTEN 0 128 [::1]:6010 [::]:*
LISTEN 0 128 [::]:39717 [::]:*
LISTEN 0 5 [::]:5900 [::]:*
5900 for incoming connections: $ sudo ufw allow from any to any port 5900 proto tcp Rule added Rule added (v6)If you wish to make your firewall rules more strict visit our How to Open/Allow incoming firewall port guide for more information.
Establish Remote Desktop Connection
At this stage we are ready to turn our attention to a client system from which we will be establishing connection to a remote Ubuntu desktop.Remina Desktop Client
The first remote desktop client we are going to use to create a remote desktop connection is Remmina.Remmina remote desktop client should already be installed on your Ubuntu 18.04 system. In case you need to install it execute:
$ sudo apt install remminaUse the
activities menu to search and start the Remmina remote desktop client or run the command: $ remmina
Select the
Alternatively, hit the
VNC protocol from the drop down menu and enter the Ubuntu remote desktop system's host name or the IP address. Hit ENTER to start a quick remote desktop connection. Alternatively, hit the
+ button and see below on how to set more options for your remote desktop connection.
Insert any arbitrary name for your remote desktop connection. Select the
VNC protocol and set Quality or Color depth. If you wish to save this connection for next time use, hit Save and Connect or simply hit the Connect button.
Once the remote desktop client attempts to establish connection, the remote desktop server needs to accept this connection. On your remote desktop server hit
If you missed this message, click on
Accept.If you missed this message, click on
Date & Time on the top panel and search for the Another user is trying to view your desktop notification.
The remote desktop sharing connection was successful. Use the Remmina panel to further tweak your remote desktop connection settings.
VNC Remote Desktop Client
Yet, another alternative to connect to a Ubuntu remote desktop sharing is by use of VNC client. First, install VNC on your client Ubuntu system:$ sudo apt install tigervnc-viewerUnlike the above Remina remote client the VNC client does not support encryption. Any attempt to connect to a Remote desktop sharing server will result in
No matching security types error. 
Connecting to remote desktop using VNC client with encryption enabled causes
No matching security types error.$ gsettings set org.gnome.Vino require-encryption falseConfirm that the encryption on your remote server is disabled:
$ gsettings list-recursively org.gnome.Vino | grep encrypt org.gnome.Vino require-encryption falseGiven that the encryption is now disabled, to add some level of privacy you may optionally first create SSH tunnel to your remote desktop for your VNC client on port
5900 before making VNC connection. We should now be able to connect to a remote desktop using
vncviewer command: $ vncviewer ubuntu-remote-desktop
Accept the remote VNC connection request.
Connected to remote desktop sharing via VNC client - Ubuntu 18.04
