Dominick Krachtus

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Effects of CPU caches

The other day, at the office, we were discussing on the choice between an array anda linked list. Frankly I’d always thought that a linked list was a …

Intel Corporation

Abusing Linux's firewall: the hack that allowed us to build Spectrum

Today we are introducing Spectrum: a new Cloudflare feature that brings DDoS protection, load balancing, and content acceleration to any TCP-based …

Linux

The Bizarre Cold Case of the Max Headroom Signal Intrusion

This was actually an international crime.<p>Hacking hides in the shadows, executed behind layers of concealment (if the hacker is smart). It’s been that …

Computer Hacking

VMware Announces vSAN Support for Klas Telecom’s Voyager Tactical Data Center (Voyager TDC)

After rigorous testing, VMware®, creator of the market-leading hyper-converged infrastructure software, VMware vSAN™, announces vSAN support for Klas …

Vmware

an open source note taking and to-do application with synchronisation capabilities

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are …

Note-Taking

The easiest way to convert files

Papua New Guinea

Making the Touch Bar finally useful

15-inch MacBook Pro with Touch Bar is my main work tool for more than a year. I use it every single day, all day long — to code, to process photos, …

Arch Linux

Composable Network Protocols vs. Encapsulation

This article is going to argue that to get composable network protocols, we have to treat them in a way that seemingly breaks encapsulation. The …

Microservices

Non-uniform memory access meets the OOM killer

Do you have machines with NUMA? That's non-uniform memory access, meaning that depending on which CPU your code is on, it might be faster to some …

Amazing

How to Fall Asleep Fast - In Less Than 2 Minutes | The Art of Manliness

Have you ever unexpectedly found yourself with a snatch of time in which to steal a nap? You tried to settle into the chair or nook in which you …

Yoga

23 Things Only 90s Sysadmins will Remember

Sometimes it’s a beautiful combination of laugh-inducing and cringeworthy as we look back on the start of our careers in IT. University and College …

Weird

SSH Permit A38

Central management and deployment for SSH keys<p>Features<p>Central management of public SSH keys and servers in a simple and readable JSON database<br>• Sync …

Linux

Interactive map of Linux kernel

The most useful Sublime Text packages

The most useful Sublime Text packages<p>It’s no secret that I enjoy using Sublime Text, both for its aesthetics and the productivity boost I noticed …

Installing PowerShell / PowerCLI on a Mac

Hi there,<p>Here is the info I used to get PowerShell and PowerCLI working on my Mac. While it is here for the next time I need it, it is also here in …

The 20 Most Iconic Diners in Chicago, 2018 Edition

Fancy fine dining and the city's hottest new spots are always a pleasure, but sometimes all one really wants is a well-made omelet. Chicago's all-encompassing restaurant scene boasts plenty of greasy spoons that are ready to serve classic diner fare at all hours of the day. Whether guests need a …

How to Block Advertisements at the DNS Level Using Pi-hole and OpenVPN on Ubuntu 16.04

IntroductionOnline advertisements are not only irritating but also potential sources of malware on your devices. While there are plugins designed to …

Linux

Making Light of the "Dark Web" (and Debunking the FUD)

I'll start this post where I start many of my talks - what does a hacker look like? Or perhaps more specifically, what do people <i>think</i> a hacker looks …

Linux'izing your Windows PC into a dev machine - Part 1

<i>(Hey, just finished Part 2, have a look here: https://cepa.io/2018/02/20/linuxizing-your-windows-pc-part2/)</i><p>On 30th of March 2016 hell officially …

We Are Morons: a quick look at the Win2k source

<b>Overview</b><br>Several days ago, two files containing Microsoft source code began circulating on the Internet. One contains a majority of the NT4 source …

How Backblaze Got Started: The Problem, The Solution, and the Stuff In-Between

Backblaze will be celebrating its ten year anniversary this month. As I was reflecting on our path to get here, I thought some of the issues we …

Online

Making network authentication simple in a Bring Your Own Device environment

Here at ViaRezo, our job is to offer a high-speed, affordable and reliable Internet connection to the students of CentraleSupélec at Paris-Saclay. We …

Qubes Air: Generalizing the Qubes Architecture

The Qubes OS project has been around for nearly 8 years now, since its original announcement back in April 2010 (and the actual origin date can be …

BlockShell

📖README.md just includes installation guide. You can find detailed guide in this wiki page<p>A command line utility for learning Blockchain technical …

HTTPie: a CLI, cURL-like tool for humans

HTTPie (pronounced <i>aitch-tee-tee-pie</i>) is a command line HTTP client. Its goal is to make CLI interaction with web services as human-friendly as …

Building Our Kick-Ass Plex Server With AMD Ryzen Threadripper 1950X

Regular <i>PC Perspective</i> readers probably know that we're big fans of Plex, the popular media management and streaming service. While just about …

Ten More Things I Wish I’d Known About bash

Intro<p>My previous post took off far more than I expected, so I thought I’d write another piece on less well-known bash features.<p>As I said before, …

Network latencies and speed of light

In this short post I’m going to attempt to convince you that current network (Internet) latencies are here to stay, because they are already within a …

Restaurant openings: CTA-themed taco shop, plus pizza and burger restaurant expansions

Jose Bustos had always wanted to open a restaurant, but struggled to find a concept that worked. It was while hungry and riding the Blue Line that he got the idea for Chicago Taco Authority, which shares the same acronym as the citywide transit service. Bustos is now cooking up both traditional and …

Sparkling Wine

10 things to do indoors in Chicago

Don’t let a crummy weather report ruin your fun: Just switch up the plan from outdoor activities to one of these things to do indoors in Chicago. If …