Explainer
Rebuild a service with Docker Compose
Choose build, up, restart, or force-recreate correctly, and verify the new image without discarding persistent data.
Explainer
Remove Docker images without confusing tags and data
Remove selected local references, investigate container conflicts, and distinguish image pruning from a complete environment reset.
Explainer
Restart one Docker Compose service
Restart selected service containers without applying new configuration, or recreate them deliberately when the image or settings change.
Explainer
Execute a command in a running Docker container
Use docker exec with the right user, environment, working directory and terminal settings, and understand its lifecycle limits.
Explainer
Run scheduled jobs with cron in a Docker container
Build a foreground cron service, use the correct cron file format, and pass selected environment values safely.
Explainer
Build a dedicated cron container
Use a complete Debian cron example with foreground scheduling, valid system-crontab syntax and observable job output.
Explainer
Keep Nginx running in a Docker container
Run the Nginx master in the foreground, test the mounted configuration in the same image, and investigate exits before adding a restart policy.
Explainer
Can a Dockerfile set the output image name?
Name image outputs with build tags, Compose configuration or a build tool, and distinguish names from stages and labels.
Explainer
Start Docker containers automatically after a reboot
Choose a restart policy, ensure the daemon starts, and distinguish process restarts from dependency readiness and live restore.
Explainer
Set PATH in a Dockerfile
Use ENV for a persistent search path, understand RUN scope and runtime overrides, and avoid confusing executable lookup with package imports.
Explainer
Upgrade a running container to a new image
Replace the container with a reviewed image while preserving configuration, validating data compatibility, and preparing a realistic rollback.
Explainer
Use local container images in Minikube
Load or build images for the correct Minikube runtime and nodes, then match the workload image reference and pull policy.