Hi.
 
Did you follow the instructions shown in the eBook, or did you already have another mosquitto installation?
 
Try to rerun the following command:

sudo systemctl restart mosquitto

Then, reboot your raspberry pi

sudo reboot

Then, check the status of mosquitto again after the RPi restarts.

sudo systemctl status mosquitto

 
Let me know the results.
Regards,
Sara

No change after following your instruction.
pi@raspberrypi:~ $ sudo systemctl status mosquitto
● mosquitto.service – LSB: mosquitto MQTT v3.1 message broker
Loaded: loaded (/etc/init.d/mosquitto; generated; vendor preset: enabled)
Active: active (exited) since Tue 2022-09-27 20:22:58 AEST; 1min 31s ago
Docs: man:systemd-sysv-generator(8)
Process: 318 ExecStart=/etc/init.d/mosquitto start (code=exited, status=0/SUCC
Tasks: 0 (limit: 4915)
CGroup: /system.slice/mosquitto.service
Sep 27 20:22:57 raspberrypi systemd[1]: Starting LSB: mosquitto MQTT v3.1 messag
Sep 27 20:22:58 raspberrypi mosquitto[318]: Starting network daemon:: mosquitto.
Sep 27 20:22:58 raspberrypi systemd[1]: Started LSB: mosquitto MQTT v3.1 message
lines 1-11/11 (END)
I have followed the steps in your book apart from the actual pi install.  I had one allready set up and readyto go. This did not include mosquitto however.
 
I examined the password file with nano and it showed the usernames I had put corectly.  Passsowrd was scrambled as expected.  
Broker responded correctly without authentication but after authentication is added I get this.
 
 
mosquitto_pub -d -t testTopic -m “Hello world!” -u mal -P mal
Error: Connection refused
 
 
this is my conf file

# Place your local configuration in /etc/mosquitto/conf.d/
#
# A full description of the configuration file is at
# /usr/share/doc/mosquitto/examples/mosquitto.conf.example
per_listener_settings true
pid_file /var/run/mosquitto.pid
persistence true
persistence_location /var/lib/mosquitto/
log_dest file /var/log/mosquitto/mosquitto.log
include_dir /etc/mosquitto/conf.d
allow_anonymous false
listener 1883
password_file /etc/mosquitto/passwd
Thank you for your help.

Hi.
I’m not sure why you’re getting that issue.
 
Did you start a new installation of the OS when you started the eBook? Did you install the mosquito from start or did you already have mosquito installed? I’m trying to understand what might be the cause.
 
I found a similar issue: https://github.com/eclipse/mosquitto/issues/641
They mention that if you set the persistence setting to false instead of true in the configuration file, it solves the problem:

persistence false

Let me know if this helps with your issue.
 
Regards,
Sara

Try only this if the previous workaround doesn’t work.
Also, try changing the following line:

pid_file /var/run/mosquitto.pid

To

pid_file /run/mosquitto/mosquitto.pid

 
 
 
Regards,
Sara

Thanks for your time Sara.
Tried all the above but no joy so  I blew away the old installation and restrated from scratch with a fresh install everything is now OK and status now says running and not exited.  Authenticated messages now working
 
Thanks again
Mal

Great!
I’ll mark this issue as resolved. If you need further help, you just need to open a new question in our forum.
Regards,
Sara