Tutorials
Step-by-step technical guides on Docker, Linux, Python, Go, and more.
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Polars Python Tutorial 2026: Faster DataFrames with LazyFrames, Expressions, and pandas Migration
Polars Python tutorial 2026: install Polars, use LazyFrames for out-of-core data, write expressions, groupby/join/filter operations, and migrate from pandas. 5-50x faster than pandas. Real benchmarks included.
Ruff 2026: Replace flake8, black, isort, and bandit with One Fast Tool
Replace flake8, black, isort, and bandit with Ruff — the ultra-fast Python linter written in Rust. Full setup guide with pyproject.toml config, pre-commit integration, and VS Code setup. Updated 2026.
SigNoz and OpenTelemetry Python 2026: Self-Host Distributed Tracing and Logs (Datadog Alternative)
SigNoz tutorial 2026: install SigNoz with Docker Compose, auto-instrument a FastAPI app with OpenTelemetry, view traces and logs in one UI, and cut observability costs vs Datadog. Step-by-step with Python.
TypeScript for JavaScript Developers 2026: From Types to a Typed REST API
TypeScript tutorial for JavaScript developers 2026: type annotations, interfaces vs types, generics, tsconfig.json strict mode, and build a typed Express REST API. Node.js 22 runs .ts natively.
Vibe Coding 2026: Build a SaaS with Claude Code Without Writing Most of the Code
Vibe coding tutorial 2026: use Claude Code to build a real SaaS MVP — FastAPI backend, React frontend, Stripe payments, and Postgres — in hours instead of days. Includes prompt engineering tips and when to intervene manually.
Zero Trust Architecture for Developers 2026: mTLS, Short-Lived JWTs, Vault, and Network Policies
Zero Trust Architecture tutorial for developers 2026: implement mTLS between microservices with cert-manager, issue short-lived JWTs with HashiCorp Vault, enforce Kubernetes NetworkPolicy, and replace your VPN. Open-source tools only.
Argo CD GitOps Tutorial 2026: Deploy Kubernetes Apps from Git
Learn GitOps with Argo CD in 2026. Install Argo CD, connect Git repos, deploy Helm charts, configure RBAC and SSO, and implement the app-of-apps pattern for multi-cluster deployments.
Context Engineering for AI Agents 2026: The Complete Guide
Context engineering is the technique that raises AI agent success rates from 30% to 90%. Learn how to design context windows, implement RAG, manage memory, and build reliable AI agents in 2026.
Crossplane AWS Tutorial 2026: Kubernetes-Native Infrastructure Provisioning
Learn Crossplane in 2026 — the CNCF top IaC trend for Kubernetes-native infrastructure. Provision AWS RDS, S3, and VPC using Crossplane Compositions, manage cloud resources as Kubernetes CRDs, and compare with Terraform.
eBPF and Cilium Tutorial 2026: Kubernetes Networking and Security
Learn eBPF and Cilium in 2026 — the #1 Kubernetes networking trend. Install Cilium as your CNI, write network policies, use Hubble for observability, and replace kube-proxy with eBPF.