All posts
RHEL Basics #7: Basic Security — firewalld, SSH Hardening
RHEL's firewall abstraction firewalld and its zone model, the firewall-cmd command set (permanent vs runtime), the four standard SSH hardening steps — disable password auth, key-based auth, lock down root login, change the port, split sshd_config.d. The final post of the series.
TypeScript Basics #1: Getting Started and Setup
What TypeScript is, why you would use it, and how to compile and run your first piece of code — all in one go.
Angular Basics #3: Data Binding and Events
How Angular templates exchange data and user input — the four binding styles, plus reactive state management with signals.
AWS Basics #4: AWS CLI and SDK Setup
Installing aws cli v2, aws configure, profiles and the credentials file, how SDKs like boto3 / aws-sdk-js fit in, and the order in which the credential chain flows.
Build a Blog with Next.js #5: SEO and Deployment (Wrap-up)
Optimize for search engines with the metadata API, build sitemap and RSS, and deploy to Vercel. Wrap up with a retrospective across the series and the 31 React posts in total.
Django Basics #3: Models and ORM Basics
Define Django models, walk the migration flow, set up ForeignKey/ManyToMany, and use QuerySet filter/get/exclude/order_by — all in one place.
Docker Intermediate #2: Build Cache — BuildKit and Layer Ordering
BuildKit-era build caching, in earnest. Spotting where layer cache breaks, sharing npm/pip caches across builds with --mount=type=cache, parallelizing builds with COPY --link, and external caches via GHA / registry.
Modern Python Basics #5: Functions — argument patterns
Defaults, *args/**kwargs, positional-only(/), keyword-only(*) — every tool for writing function signatures expressively.
RHEL Basics #6: Filesystem Basics — XFS, mount, /etc/fstab
RHEL 9's default filesystem XFS and how it differs from ext4, viewing disks with lsblk / df / du, the full cycle of partitioning a new disk, formatting with mkfs.xfs, mounting it, registering permanently in /etc/fstab via UUID, and managing swap.
What Do Developers Actually Do — A Map of Development Roles
We call them all "developers," but front-end, back-end, DevOps, data, and AI engineers do completely different work. This post maps out what each role actually does, for people weighing a career and for people who work alongside developers.
Angular Basics #2: Components and Template Syntax
Create your first Angular project with Angular CLI, then walk through the structure of a component, interpolation, and how to assemble components.
AWS Basics #3: Cost Management — Billing Alerts, Cost Explorer, Free Tier
The limits of the Free Tier, setting up AWS Budgets / billing alerts, analyzing the bill with Cost Explorer, and a tag strategy that holds up in production — the guardrail that prevents first-bill shock.