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What Are Embeddings? A Beginner's Guide with Code
Embeddings turn text into numbers a computer can compare. Here's the working mental model, a runnable Python example, and where embeddings fit in real apps.
Embeddings turn text into numbers a computer can compare. Here's the working mental model, a runnable Python example, and where embeddings fit in real apps.
Provision real cloud resources with Terraform — a VPC, an S3 bucket, and an EC2 instance — using the standard init/plan/apply workflow.
Generate an SSH key, set up passwordless login, and configure aliases for the servers you use daily — all without copy-pasting yet another long command.
A hands-on intro to prompt engineering. Learn the four levers (role, format, examples, constraints) and watch a vague prompt turn into a reliable one.
A clear walkthrough of Linux file permissions. Read the funny rwx- letters, change them safely with chmod, fix "permission denied" errors with confidence.
Run your first three Kubernetes objects — Pod, Deployment, Service — on a local cluster, then understand why each one exists and how they fit together.
GitOps in plain words — what it actually is, the workflow it enables, and a hands-on demo using Argo CD on a local Kubernetes cluster.
Walk through a working GitHub Actions workflow — install, test, build, deploy — for a tiny Node app. Every line explained.
Walk through your first Dockerfile, container run, and image push in 30 minutes. No theory dumps — just the commands and what each one is doing.
A working retrieval-augmented generation app you can run today. Markdown ingestion, embeddings, semantic search, and an LLM answer — start to finish in one afternoon.
Build a real disk-cleanup script step by step. Learn variables, conditionals, loops, error handling, and the safety preamble that prevents foot-guns.
A working mental model for AWS VPCs — what each piece does, how they connect, and why "VPC" is the wrong mental model if you came from physical networks.
Create your first S3 bucket, upload and download files, and set up the right access controls — without accidentally making everything public.