Installing MQTT

In order to install MQTT on my linux server machine I took the following steps:

1. sudo apt update
2. sudo apt install mosquitto-clients
3. sudo apt install mosquitto
4. sudo systemctl status mosquitto to check if mosquitto has been installed
5. sudo systemctl enable mosquitto to get mosquitto started on system start
6. sudo mosquitto_passwd -c /etc/mosquitto/passwd david to set a userid and password for authentication to mosquitto (NOT the password to the linux account)
7. sudo nano /etc/mosquitto/conf.d/default.conf and set the contents to:

   allow_anonymous false
   password_file /etc/mosquitto/passwd

8. sudo systemctl restart mosquitto