The default package available from the Debian repository is enable just for the MQTT protocol. These are the commands to install it.
sudo apt update sudo apt install mosquitto
listener 1883 listener 1884 protocol websockets
Then restart Mosquitto:
service mosquitto restart
To test if Mosquitto is working on your board make a subscription to the broker to receive all messages:
mosquitto_sub -h localhost -t "#" -v
Then open another therminal session and send a messagge to the topic "test":
mosquitto_pub -h localhost -t "test" -m "Hello world!"
You will see the message received.