How to install mosquitto MQTT server on linux

Step 1) Update mosquitto repository

run bash command: sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa

(if above apt-add-repository command does not work, you might need install software-properties-common Package by runing following command first:

sudo apt-get install software-properties-common python-software-properties  )

Step 2)install mosquitto
run bash command: sudo apt-get install mosquitto

Step 3)start mosquitto

run bash command: sudo service mosquitto start

Step 4) check mosquitto running status

You should see mosquitto start/running , process xxxx

run bash command: sudo service mosquitto status

Step 5)Check mosquitto port:
run bash command:  netstat -anplt | grep 1883

you should see 1883 port is listened by mosquitto process

Step 6) test MQTT broker
First,  you need open a new terminal window and install mosquito client by running following commands:
sudo apt-get install mosquitto-clients

Second, issue the given below command to subscribe the topic “mqtt”:

sudo mosquitto_sub -h localhost -t "raspi" -v

Last, Open another terminal and issue the given below command to publish message to the topic “mqtt”

sudo mosquitto_pub -h localhost -t "raspi" -m "This is my first MQTT message"

Then you should see a message “This is my first MQTT message” in first terminal window

Congratulations!  You have set up your first Mosquitto MQTT server!