Linux
441 entries match these filters
- 0279 What is a reverse proxy? A reverse proxy is a server that sits in front of your apps, receives all requests and forwards them to the right… Beginner · Explains an idea · Any system Article Web servers & reverse proxies 15 Oct 2026
- 0280 What is a firewall? A firewall is a filter that decides which network connections are allowed in or out of a computer or network. Beginner · Explains an idea · Any system Article Firewalls 15 Oct 2026
- 0265 Turn a one-liner into a robust bash script: strict mode, options, logging, traps, locking and a schedule Grow a find-and-gzip one-liner step by step into a dependable bash script with strict mode, getopts, usage text, logging, error traps, dry-run,… Intermediate · Guided project · Linux, macOS Article Services & systemd · Shell scripting 15 Oct 2026
- 0261 Build a Python command-line to-do app: from empty folder to installable command Create a small to-do tool in Python with argparse and JSON storage, test it with pytest and package it with pyproject.toml so… Beginner · Guided project · Any system Article Environments & packages · Files & automation · Testing 15 Oct 2026
- 0262 Make your first pull request: Git and GitHub from first commit to merged change A complete beginner's path through Git and GitHub: set up Git, make commits, ignore files, use branches, push to GitHub, open a… Beginner · Guided project · Any system Article Branching & rebasing · Pull requests · Setup 15 Oct 2026
- 0263 Build a notes REST API with plain Node.js: CRUD, validation, status codes and CORS Write a small JSON API for notes using only Node.js built-ins: create, read, update and delete, input validation, correct HTTP status codes,… Intermediate · Guided project · Any system Article Making requests · Node.js · Status codes 15 Oct 2026
- 0248 Run your first KVM virtual machine with libvirt and virt-install Turn a Linux desktop or server into a KVM host: check CPU support, install libvirt, use the default NAT network, create a… Beginner · Guided project · Linux Article Basics 15 Oct 2026
- 0246 Valkey: open source key-value datastore (valkey-io/valkey) Valkey is a BSD-licensed key-value data structure server, forked from Redis just before its 2024 license change and backed by the Linux… Linux, macOS Repo Administration & persistence · Redis 15 Oct 2026
- 0249 Set up and harden a fresh Linux server in one afternoon Take a new Ubuntu, Debian or Rocky/Alma server from first login to a safer baseline: sudo admin, SSH keys only, firewall, automatic… Beginner · Guided project · Linux Article Networking & firewalls · Packages & updates · Users, sudo & hardening 15 Oct 2026
- 0250 Containerize a Node.js app and run it with PostgreSQL using Docker Compose Package a small Node.js web app in a multi-stage Docker image, then run it next to PostgreSQL with Docker Compose, named volumes,… Intermediate · Guided project · Linux, macOS, Windows Article Docker basics · Docker Compose · PostgreSQL 15 Oct 2026