Raspberry Pi MicroSD Check Using Agnostics via CLI (Raspberry Pi)

sudo apt install agnostics

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)

TCPDump (Raspberry Pi)

TCP Packet Dump

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)

Using Ansible To Create And Manage Users (Linux / Raspberry Pi)

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)

SHA256 File Hash Values And How To Check Them (Raspberry Pi / Mac OS X / PowerShell)

Image showing SHA-256 value

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)

Installing PowerShell Core on Raspbian (Raspberry Pi)

pwsh (PowerShell Core) in action

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)