DevOps

Articles about operating software in production — containers, orchestration, observability, and the boring config that keeps services up at 3 AM.

Containers

Docker Without the Magic

Namespaces, cgroups, layered filesystems, the commands you use.

Kubernetes

Kubernetes Pods and Deployments

From a Docker user's perspective — what k8s actually adds.

IaC

Terraform: A Practical Introduction

Providers, state, modules, the plan/apply loop.

Web

nginx as a Reverse Proxy

upstream blocks, TLS, websockets, gotchas.

Security

SSH Hardening on Linux

Key-only auth, fail2ban, audit logs.

Firewall

iptables vs nftables

The Linux firewall, the new one, and the migration path.