TechHub

A binary from a vendor fails on the production server and works on your laptop. There's no source, no logs, and no documentation. This is where strace earns its

I ran Pi-hole for a year before adding Unbound, and the difference isn't what I expected. It's not that ads suddenly stopped — Pi-hole handles those fine on it

I bought a Raspberry Pi 4 for Home Assistant, followed the official install guide, had it running in twenty minutes, and then spent three weekends getting it to

I spent a weekend building a WireGuard setup for my home lab. It worked, right up until my ISP rotated my public IP and I had to update the endpoint on every cl

The default postgresql.conf is tuned for a machine with 128 MB of RAM from 2004. Every production Postgres instance runs with settings that are wrong for its ha

Every team I've joined has had a different Git workflow, and every one of them had someone quietly rebasing pushed commits while everyone else pretended not to

Two Nginx features sit in the "everyone should use this, almost nobody does" category: proxy caching and rate limiting. Both are maybe ten lines of config. Both

Most uptime monitoring services charge per monitor. I have twelve things I want to check, and somewhere around the fourth monitor the pricing starts to feel abs

I ran OpenVPN on a cheap VPS for years. It worked, but connecting took fifteen seconds, and the config file was four hundred lines of certificate chains I never

I used to keep my dotfiles in a normal Git repo and symlink them into place with a shell script. It worked, but every new machine meant cloning, running the scr

Cloudflare's dashboard has roughly four hundred switches. About nine of them matter for a small site, and two of them are the reason your site is showing a redi

I put off trying Caddy for about two years, mostly out of habit. Nginx configs are muscle memory at this point, and Certbot does its job. Then I set up a side p

Let's Encrypt issues free, trusted TLS certificates and automates renewal. Certbot is the official client that configures your web server and installs a renewal

A well-written Dockerfile produces small, secure, fast-building images. A poorly written one produces multi-gigabyte images that rebuild from scratch on every c

A single Redis instance is a single point of failure. Sentinel provides automatic failover for a primary-replica setup, while Cluster shards data across multipl

GraphQL lets clients request exactly the data they need in a single round trip. Unlike REST, where endpoints are fixed, a GraphQL API exposes a typed schema, an

Elasticsearch is a distributed search and analytics engine built on Apache Lucene. It powers full-text search, log analysis, and real-time dashboards. This tuto

RabbitMQ is a mature message broker that implements the AMQP protocol. It routes messages between producers and consumers through exchanges and queues, and it e

OAuth 2.0 is the standard protocol for delegated authorization. It lets users grant an application limited access to their data on another service without shari

WebSockets provide full-duplex communication over a single TCP connection. Unlike HTTP request-response, the server can push data to the client at any time. Thi

Prometheus collects metrics by scraping HTTP endpoints, and Grafana turns that data into dashboards and alerts. Together they form the most common open-source m

The AWS CLI is the fastest way to work with S3. It handles bulk uploads, cross-region copies, lifecycle policies, and scripted backups. This tutorial covers ins

Apache Kafka is a distributed event streaming platform used for real-time data pipelines, log aggregation, and event-driven microservices. This tutorial explain

Kubernetes (K8s) is the de facto standard for orchestrating containers at scale. It handles scheduling, scaling, self-healing, and service discovery. This tutor

Ansible is an agentless configuration management tool. It connects to servers over SSH, runs tasks defined in YAML playbooks, and enforces the desired state of