System & Network Admin

So, what's "port knocking," and how can you use it to open Linux firewall ports? We'll walk you through all of it---and why you shouldn't use it.

I have been working on a double-entry ledger implementation in PostgreSQL called pgledger, and I wanted to write some example scripts. pgledger is written in SQL and meant to be used from any language or platform where you can call SQL functions, so I wanted the examples to be pure SQL.

Fast, focused, and open — a modern WebKit browser for Mac.

In this article, you learn how to create a Linux VM cluster in Azure using Terraform

I’m going to go ahead and admit it: I really have too many tray icons. You know the ones. They sit on your taskbar, perhaps doing something in the background or, at least, giving you fingerti…

A cost-effective, Linux-based alternative to proprietary NAS devices, OMV is a powerful and flexible way to manage network storage on your own hardware.

Developer Wiaam Suleiman recently released Doom Screen Saver, a lighthearted project that turns Doom into a fully functional Windows screen saver. Everything the tool needs is packed...

Your server or your Mastodon account could go away at any time. If you don’t want to lose your data, you should back it up. Here’s how to do that, and how to restore it later.

If you’re a regular reader of Hackaday, you may have noticed a certain fondness for Meshtastic devices, and the LoRa protocol more generally. LoRa is a great, low-power radio communications s…

Minimalistic graphical terminal web browser using sixels.

Programmers hold to a wide spectrum of positions on software complexity, from the rare command-line purists to the much more common web app developers, and the two extremes rarely meet. One point o…

Our computers can display an astonishing range of symbols. Unicode alone defines more than 150,000 characters, covering everything from mathematical operators and phonetic alphabets to emoji and ob…

This article demonstrates setting up Windows XP on Proxmox VE, including virtual machine configuration, using VirtIO hardware, installation process, obtaining the OS, and dealing with updates and drivers.

Windows 98 in Promox? Yep it can be done and this article, I've gone through what you need to get it setup.

Managing IP addresses efficiently can feel like herding cats, especially when working with complex AWS environments. That’s where Amazon…

Discover how to seamlessly transition from IPv4 to IPv6 in AWS without hassle. This guide covers essential topics like IPv6 subnetting, public and private subnets, and practical examples of DNS64 and NAT64 configurations. Learn to optimize your AWS network architecture, reduce costs associated with IPv4 addresses, and leverage IPv6 for modern IoT and smart device connectivity. Perfect for cloud professionals aiming to enhance their AWS networking skills and stay ahead in the evolving digital landscape.

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Connect everything, from cloud to IoT, with the next-generation global network solution. Simple, resilient, and secure networking in minutes.

Pagers were once a great way to get a message to someone out in public; they just had to be cool enough to have one. These days, they’re mostly the preserve of doctors and a few other niche o…

Disclaimer: This is a copy/paste of the ReadMe here: https://github.com/pdgonzalez872/nerves_rpi3_wifi_picam. Working code is there if…

[Nicholas Murray]’s Composite Test Pattern Generator is a beautifully-made, palm-sized tool that uses an ESP32-based development board to output different test patterns in PAL/NTSC. If one is…

Why traditional logging fails and how wide events can fix your observability

So anyway, I built this custom bash prompt and thought of sharing it:https://github.com/nix-tricks/nix-prompt

People are always asking me about the AIOC and where to get them... So I ordered up a set and tested them out. Let's take a look!👉 Make them yourself at Ne...

Learn live coding techniques to make your own music on Strudel.For this tutorial you will need a laptop and the Strudel workshop website.What You Will LearnT...

Learn how to install and use LocalSend for easy, secure file sharing between Linux, Windows, and other devices on your local network.

L2TP (which stands for Layer 2 Tunneling Protocol) is a tunneling protocol designed to support virtual private networks (VPN connections) over the Internet.

In this article, you will learn how to quickly and automatically set up your own IPsec/L2TP VPN server in CentOS/RHEL, Ubuntu, and Debian Linux distributions.