Tutorials
Step-by-step technical guides on Docker, Linux, Python, Go, and more.
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Zero Trust Architecture for Developers 2026: Practical Implementation Guide
Implement Zero Trust Architecture in 2026 — 45% YoY search growth. Learn mTLS, SPIFFE/SPIRE, OPA policies, identity-based access control, and service-to-service authentication for cloud-native systems.
Bash Scripting for DevOps 2026: 5 Production Scripts with Error Handling and Tests
Bash scripting for DevOps engineers: 5 production-ready scripts for log rotation, HTTP health checks, PostgreSQL backup, Docker deploy, and secret rotation — with error handling, ShellCheck, and bats tests.
Django REST Framework Tutorial 2026: JWT Auth, Permissions, Filtering, and Tests
Django REST Framework tutorial 2026: build a production API with JWT authentication (SimpleJWT), object-level permissions, DjangoFilterBackend filtering, pagination, and pytest-django tests.
Docker Compose v2 Tutorial 2026: From Local Dev to Production with Profiles, Health Checks, and Secrets
Docker Compose v2 tutorial 2026: compose.yaml structure, health checks, profiles for dev/staging/prod, secrets management, named volumes, depends_on with conditions, and production patterns.
FastAPI Tutorial 2026: Build a Production REST API with PostgreSQL, JWT Auth, and Docker
FastAPI tutorial 2026: build a production REST API with async PostgreSQL (SQLAlchemy 2.0), JWT authentication, Pydantic v2 validation, Alembic migrations, and Docker Compose deployment.
Git Rebase vs Merge vs Squash: When to Use Each (2026 Guide)
Git rebase vs merge vs squash explained: when each strategy produces a better commit history, how to do interactive rebase, how to fix a botched rebase, and team workflow recommendations.
GitHub CLI (gh) Tutorial 2026: Replace Your Browser Workflow from the Terminal
Complete GitHub CLI (gh) tutorial 2026: manage issues, create and review PRs, trigger GitHub Actions, create releases, build custom aliases, and use gh in CI/CD scripts — full developer workflow from the terminal.
Go Goroutines and Channels: Production Concurrency Patterns (2026)
Master Go goroutines and channels with production patterns: worker pools, fan-out/fan-in, context cancellation, semaphores, and pipeline patterns — with benchmarks and real-world examples.
Helm Charts Tutorial 2026: Create, Test, and Publish Kubernetes Applications
Helm charts tutorial 2026: create a Helm chart from scratch, values.yaml overrides, dependencies, chart testing with helm unittest, and publishing to OCI registry (GHCR/ECR).
Linux File Permissions Explained 2026: chmod, chown, umask, SUID/SGID, and ACLs
Linux file permissions complete guide 2026: read/write/execute bits, chmod octal and symbolic, chown, umask, SUID/SGID security risks, sticky bit, and setfacl/getfacl for fine-grained ACLs.