The Raspberry Pi is a fantastic computer and the GPIO (General Purpose Input / Output) pins allow for lots of a different hats, or phats (Pi Hats). I have used some of these options in past project (e.g. a temperature project, a countdown display) and installation of the hats is generally very easy, i.e. power … Continue reading Raspberry Pi Sense Hat (Raspberry Pi)
I've had a Raspberry Pi camera module (v1) since spring 2015, but I've rarely put it to use. With some spare time on my hands I have decided to see if I can build a camera feed on a webpage. Before I continue I should point out that if you are interested in using the … Continue reading Raspberry Pi Live Camera Webpage Feed V1 (Python / Raspberry Pi)
Towards the beginning of March 2020 raspberrypi.org released a tool to check the speed of a microSD card being used by the Raspberry Pi. The details for this tool, called "agnostics" can be found at https://www.raspberrypi.org/blog/sd-card-speed-test/ or if you want to install the tool then use sudo apt install agnostics . You may need to … Continue reading Raspberry Pi MicroSD Check Using Agnostics via CLI (Raspberry Pi)
What is tcpdump? TCP (Transmission Control Protocol) is a communication standard that devices use to talk establish communications between each other. The communication then takes place in packets. Normally a lot of the communication between devices is hidden away from us humans as we don't need to see our computer ask a DNS server for … Continue reading TCPDump (Raspberry Pi)
If you have multiple Linux devices (e.g. Raspberry Pis) you may find it helpful to set up an apt cache to help with updates, especially if you have a poor internet connection or limited data allowance. An apt cache works by caching (i.e. saving) all the updates on one device so that other devices can … Continue reading Using A Raspberry Pi As An Apt Cache (Raspberry Pi)
If you grew up in the early 90's you may remember computing magazines that came with game programming code typed up inside, so that you the reader could type it into your computer and play the game. I'll admit this was always a bit "hit and miss" when I attempted it, which could have been … Continue reading Code The Classics Volume 1 Review (Python)
If you have multiple Linux devices (e.g. multiple Raspberry Pi computers) and multiple user accounts that need access to those devices (i.e. maybe a Code Club of pupils) and want their own user accounts on the devices it could be a lengthy process managing the accounts and devices. Which is where Ansible (https://www.ansible.com/) comes into … Continue reading Using Ansible To Create And Manage Users (Linux / Raspberry Pi)
Imagine that you are a software company and host an awesome free piece of software. One day your site is hacked and the download file for your software is replaced with a malicious version of the software. It might be days (or longer!) before you notice. Or what if someone is intercepting traffic and altering … Continue reading SHA256 File Hash Values And How To Check Them (Raspberry Pi / Mac OS X / PowerShell)
When you connect to a system via SSH a banner of text is displayed. Today I am going to look at changing the default SSH banner text on my Raspberry Pi 4 (Raspbian Buster). The default Raspbian Buster SSH banner looks like this: This banner contains: Information about the system via Pluggable Authentication Modules (PAM) … Continue reading SSH Banner Text (Raspbian)
PowerShell Core is a version of PowerShell that can be installed on Windows, Mac OS X (I covered it here) and Linux, i.e. Raspbian. For this blog post I am going to using my Raspberry Pi 4 and Raspbian (Buster). "PowerShell is a task automation and configuration management framework from Microsoft, consisting of a command-line … Continue reading Installing PowerShell Core on Raspbian (Raspberry Pi)
