6 guides
The three core Docker concepts made clear: images are blueprints, containers are running instances, volumes hold data. How they relate and what a delete wipes.
Understand docker run for real: -d, -p, -v, -e, --name, --rm, and --restart, with copy-paste examples for Nginx, Postgres, and one-off commands.
Reclaim Docker disk space safely: read docker system df, use docker system prune the right way, and understand the -a and --volumes danger before you run it.
Run WordPress with Docker Compose: a working wordpress + MySQL stack with named volumes for persistence, env vars, ports, a reverse proxy note, and backups.
Back up Docker named volumes the reliable way: tar a volume via a temp container, restore it, dump databases properly, schedule it, and move data between hosts.
Bind mount vs named volume in Docker: how they differ, when to use each, where data lives, permissions, backups, and the down -v data-loss trap.