Ads can be really annoying on some websites, and while there are browser extensions like Adblock to block them, those solutions are only local to your browser, and not always very effective. A better way to block ads is to use a Pi-Hole on your local network. Pi-Hole is a software for the Raspberry Pi, that acts as your DNS server to block queries for known advertiser domains. Let’s see how to install Pi-Hole on a Raspberry Pi, and how to configure your network to use it!
A quick solution to SD card corruption is to create a backup image of your SD card, so that if you face a SD card corruption again, you can simply burn that image to the card, put it in your Raspberry, and be back exactly where you were before the corruption. In this article we’ll learn how to create an image of the Raspberry Pi’s SD card (or any SD card really) on Mac OS X.
One of the key aspects to security on Linux systems is the regular updates the community makes to the distribution and packages. A lot of those updates are meant to improve security and fix potential vulnerabilities. For this reason, it’s important to keep your system up to date, especially on a publicly available server. But doing it manually would be a time consuming process, it would involve regularly login into your server and running updates. Instead, it’s much easier to configure a tool that will do it automatically for you. In this article we’ll learn how to enable automatic security updates on Ubuntu, using unattended-upgrades.
The main tool to set up the firewall on Ubuntu is iptables. It is powerful, but very complicated to learn. Fortunately, there is an alternative called UFW (for Uncomplicated FireWall), that is described by Ubuntu as “a frontend for iptables”. Basically, UFW lets you set rules for your firewall in a much easier way that iptables does. Let’s learn how to set some basic rules using UFW!
In this series of tutorials we’ll take a look at basic server security, and in this first article we’ll learn how to improve SSH security. Any machine connected to the Internet immediately becomes a potential target to any kind of attack (hackers, automatic bots, …). Security is somewhat less of a concern for regular Web hosting (shared hosting or managed hosting for example), as most of it is managed by your hosting provider. Servers that you fully manage, however, come with absolutely no security out of the box. This is the case for most dedicated servers, VPS (Virtual Private Servers) and Cloud platforms (AWS, Google Cloud, …).
We’ve already seen how to create a simple socket server in Python, but sometimes we need to handle multiple incoming requests simultaneously, that require processor-heavy computation from the server. That’s what a threaded socket server can achieve.
The ESP8266 is an amazing microcontroller that includes a Wifi chip, for a very low price (about $15 for two on Amazon). It offers enough resources to make it the ideal microcontroller choice for most Internet of Things projects. There are several ways to program it, including but not limited to, pseudo-C++ with the Arduino IDE, LUA scripts or MicroPython. In this tutorial we will learn how to set up the ESP8266 with a MicroPython firmware, making it possible to run MictoPython scripts.
In this tutorial we’ll learn how to install Mosquitto on a Raspberry Pi. The goal is to use the Raspberry Pi as a MQTT broker in an IoT application. We’ll install Mosquitto, configure it and test it to make sure everything was correctly set up.
One of the most popular articles on this website is the tutorial on how to build a 5V power supply on a breadboard. Following up on that, today we’re going to build a power supply that can output both 3.3V and 5V at the same time. This is particularly useful for circuits where both voltages are needed. We will solder the components on a small protoboard, which will conveniently plug directly into the power rails of our breadboard.
The basic version of Nano that comes with Mac OS X doesn’t support syntax coloring, and it’s pretty hard to find clear information online about how to enable it. Here is a quick guide on how to enable syntax coloring in Nano on Mac OS X.