In ACE Direct v4.0, two major components are required on the Kurento hosting instance - Kurento Media Server and Signaling Server.

## Update *apt* and install *kurento*
sudo apt-get update

## Import the key from Kurento TEAM
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 5AFA7A83
## In certain cases where import with above command may fail, try using hkp://keyserver.ubuntu.com:80 and make sure proxy is set via --keyserver-options if there is one.
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 5AFA7A83


## Set DISTRO to "bionic" for Ubuntu 18.04, "xenial" for Ubuntu 16.04
DISTRO="bionic"

## Adding repo to source
sudo tee "/etc/apt/sources.list.d/kurento.list" >/dev/null << EOF
# Kurento Media Server - Release packages
deb [arch=amd64] http://ubuntu.openvidu.io/6.11.0 $DISTRO kms6
EOF
unset DISTRO

## Install kurento-media-server
sudo apt-get update && sudo apt-get install --yes kurento-media-server

Kurento uses a cerficate file that combines private key, certificate and intermediate CA.

## Create a combo certificate for Kurento
cat key.pem fullchain.pem > server.pem

/etc/kurento/kurento.conf.json: The main configuration file to provide settings of Kurento Media Server. Defines the WebSocket(WS)/WebSocket Secure(WSS) ports and path to combo certificates. See https://doc-kurento.readthedocs.io/en/6.9.0/features/security.html#configure-kurento-media-server-to-use-secure-websocket-wss for more details. ¹

/etc/kurento/modules/kurento/WebRtcEndpoint.conf.ini: Specific parameters for WebRtcEndpoint.¹

/etc/kurento/modules/kurento/MediaElement.conf.ini: Generic parameters for all kinds of MediaElement.²

/etc/kurento/modules/kurento/SdpEndpoint.conf.ini: Audio/video parameters for SdpEndpoints (i.e. WebRtcEndpoint and RtpEndpoint).²

/etc/kurento/modules/kurento/HttpEndpoint.conf.ini: Specific parameters for HttpEndpoint.²

^[1] Check repo directory in acedirect-kurento/confs/kurento/ for the examples
^[2] Check the Kurento Github page

1. Log into the Kurento media server.

2. sftp the videoPrivacy.webm file to the Kurento media server.

3. From a terminal:

    ```bash
    $  sudo cp videoPrivacy.webm /tmp/media/.
    $  sudo chown -R kurento:kurento /tmp/media
    $  sudo chmod 644 /tmp/media/videoPrivacy.webm
    $
    ```
   

4. From the ACE Direct node server, edit dat/config.json to have this entry:

    ```bash
    "media_server": {
        "privacy_video_url": "file:///tmp/media/videoPrivacy.webm"
    },
    ```