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Is it possible to start a Ubuntu remote desktop session over netFIELD Cloud to an netFIELD Extension Linux enabled device?

Yes this is possible.

STEP 1:

Ubunutu supports Remote Desktop sessions by default.

Visit this page https://help.ubuntu.com/stable/ubuntu-help/sharing-desktop.html.de to install GNOME Remote Desktop first on your Ubuntu machine.

Follow the instruction and enable Remote Desktop Support in the Ubuntu settings. Enable the "Enable Legacy VNC Protocol" and set the switch "Remote Control" to enable.

The remote desktop access via VNC clients is now already available via <Ubuntu machine IP address>:5900

STEP 2:

Install the noVNC function that turns VNC based protocol sessions into html5 sessions made for web browsers

Use the following command on your Ubuntu machine

sudo apt install novnc

STEP 3:

For a test start the noVNC function manually with

sudo /usr/share/novnc/utils/launch.sh --vnc 127.0.0.1:5900

STEP 4:

Start a web browser session from a different machine with

http://<<Ubuntu machine IP address>:6080/vnc.html

STEP 5:

Login with the password

STEP 6:

Enable the "Remote Control" function for your Ubuntu device in netFIELD Cloud

Configure the "Remote Control Settings" of your Ubuntu device as follows:

host = 127.0.0.1

http port = 6080