Docker

How to Install Docker Engine on Ubuntu

Install Docker Engine on Ubuntu with the official APT repository. Check existing packages, verify Compose and Buildx, and avoid common access and port mistakes.

Docker Compose for Web Apps: A Working Two-Service Guide

Build a Flask and Redis web app with Docker Compose. Follow the service network, protect data and secrets, check readiness, and diagnose failed connections.

How to Back Up and Restore Docker Volumes and Databases

Back up Docker volumes and live databases safely, save Compose dependencies, and test recovery in an isolated project with concrete restore checks.

How to Inspect and Clean Docker Containers and Images Safely

List Docker containers and images, check mounts and rollback needs, choose targeted removal or pruning, and diagnose disk space that stays full.