The foundation everything runs on — servers, Linux, networking, web servers, containers, deployment, and operations.
12 articles
A server is just a computer that does a job for other computers. Learn what a server really is, how it differs from your laptop, the kinds of servers you'll meet, and why everything online depends on them — explained simply, from zero.
Almost everything online is a conversation between a server and a client. Learn exactly what each side does, how they differ, where your code actually runs, and why knowing which is which saves you from a whole class of confusing bugs.
Servers are named after the job they do, not the box they run on. Walk through the main types of servers — web, application, database, file, mail, DNS, proxy, and more — with plain explanations of what each one is for and how they fit together.
14 articles
Sooner or later, working with servers means working with Linux. Learn why Linux dominates the server world — its stability, low cost, control, security model, and remote-friendly design — and why getting comfortable with it pays off for years, explained from zero.
A Linux distribution is the kernel plus everything packaged around it. Learn what a distro actually is, why hundreds exist, how the major families differ, and how to pick a sensible one for a server — explained from zero, vendor-neutral.
Servers have no screen and no mouse — you control them by typing. Learn what the command line really is, how the shell reads what you type, the anatomy of a command, and the handful of habits that turn a blinking cursor into the most powerful tool you own, explained from zero.
8 articles
A web server is the piece of software that listens for browser requests and sends back web pages. Learn what a web server actually does, how it differs from the machine it runs on, what HTTP has to do with it, and where it sits in the journey from URL to page — explained from zero.
Type a URL, hit Enter, and a page appears. But what actually happens inside the web server during those few hundred milliseconds? Walk through the full request lifecycle — listening, parsing, routing, responding — step by step, from zero.
When a browser asks for a page, the server either hands over a file it already had, or builds a fresh page on the spot. That single difference — static vs dynamic content — shapes speed, cost, and how your whole site is built. Here's the full picture, from zero.
10 articles
A network is just a group of computers that can send messages to each other. Learn what a network really is, the pieces that make one work, how data actually moves across it, the common types you'll meet, and why every server depends on one — explained from zero.
What actually happens between typing a web address and seeing the page load? Follow a single request across the real internet — DNS, IP addresses, routers, packets, and the round trip back — explained plainly, from zero.
TCP/IP is the set of rules that lets any two computers on Earth exchange data reliably. Learn what TCP and IP each do, how the layered model works, the difference between TCP and UDP, and how a single request actually travels — explained from zero.
8 articles
A container packs your app together with everything it needs to run, so it behaves the same on every machine. Learn what a container really is, how it differs from just installing software, what's actually inside one, and why containers changed how software ships — explained from zero.
Containers and virtual machines both let one physical server run many isolated workloads, but they solve the problem in completely different ways. Learn how each one works, where the line is drawn, what they trade off, and when to reach for which — from the ground up.
Containers aren't hype — they fix concrete, painful problems: 'it works on my machine,' messy dependencies, slow onboarding, and fragile deployments. Here's what containers actually buy you, when they're worth it, and when they're overkill.
10 articles
Deployment is the moment your code stops running only on your machine and starts running where real people can reach it. Learn what deployment actually means, the steps it involves, why it's trickier than it sounds, and how the modern automated version works — explained from zero.
Code rarely jumps straight from your laptop to real users. It passes through environments — development, staging, production, and friends. Learn what each one is for, why teams keep them separate, and how the same app behaves differently in each.
Deployment isn't one magic button — it's a sequence of steps that turns your source code into a running app on a server. Learn the universal stages (build, transfer, install, migrate, switch, verify), what each one does, and how the modern automated pipeline runs them for you.
8 articles
A fresh server on the internet is a target within minutes. Server hardening is the set of habits that shrink the ways in. Learn what hardening means, the layers it covers, and a practical checklist you can apply to any machine — explained from the ground up.
SSH is the front door to your server, and attackers know it. Learn how to harden SSH the right way — key-based login, disabling passwords and root, changing defaults, limiting users, and the small settings that keep automated attacks out — explained from the ground up.
Knowing what a firewall is and actually configuring one well are two different skills. Learn how to write a default-deny rule set, order rules correctly, allow your own access first, handle IPv6 and cloud security groups, and test before you commit — a practical, vendor-neutral guide from zero.