To install Mosquitowget http://repo.mosquitto.org/debian/mosquitto-repo.gpg.keysudo apt-key add mosquitto-repo.gpg.keycd /etc/apt/sources.list.d/sudo wget http://repo.mosquitto.org/debian/mosquitto-buster.listsudo apt updatesudo apt upgradesudo apt full-upgradesudo apt install mosquittosudo apt install mosquitto-clients
Amazon Alexa devices don’t respond to ping so the default check-host-alive command doesn’t establish whether Alexa is up or down. She does respond, however, to NMAP requests and these instructions provide a way to do that.
Introduction Having got email notifications working from Nagios and being inundated with emails that I will no doubt ignore I got to thinking about how I could automate various other tasks depending on the state of the network. Nagios “knows” what’s up and what’s not. I have various devices on my network that can switch …
This post is based on an article I read at https://www.unixmen.com/send-alerts-nagios-core-using-gmail-yahoo/ and assumes a working Nagios installation with at least a basic configuration as described here. However, I found that my configuration required some amendments to get it working. I found them by trial and error so decided to record my steps here for future …
This post describes the steps and principles involved in updating the default Nagios configuration to add a network host with a single service. It assumes a running Nagios system has already been setup as described here. Nagios Core is configured by editing text files which reside in one of the following directories: To direct Nagios …
What is Nagios? Nagios is a network monitoring and alerting system. Nagios Core is free and open-source. 1. Install OS and configure basic setup This is a topic worthy of an article that applies to a wider audience so I’ve written it separately – drop this entire article in here if you need these instructions …
Raspberry Pi, SD card, PSU, card reader and a laptop with WiFi and Internet – set up and deploy without ever using any local peripherals (unless you can call its power supply a peripheral) While this set of instructions is easily found all over the web I’ve put it in one place for my own …
My initial (decent) stab at an ADS-B antenna This is a work-in-progress and relates to this article on further developments beyond the details below. See also Antenna A’s stats and design here. The design is a basic 6.5-element coaxial collinear antenna with a whip, feedline, chokes and a decoupling sleeve. Further developments will assess improvements …
Have you ever tried to start from scratch – write a new Raspbian image to an SD card you’ve used before? Unless I’m alone an existing image causes Raspberry Pi Imager to report “Destination disk full” and will not allow you to override that even if you don’t care that it’s already full. (At least …
How to identify Raspberry Pi model details from the command line. Or, to put it another way, which Pi did I SSH into? To get the model: then read the revision from the table –OR– Then lookup the revision from https://elinux.org/RPi_HardwareHistory To get RAM details (if you have a Pi 4 with 2GB and a …