← Theory library

Docker theory

Linux namespaces, cgroups, and multi-stage distroless images.

Practise in the Code Lab →

Easy

1. Linux Namespaces & CgroupsHow containers actually work under the hood.
3. Images, Layers, and Build CacheHow Docker builds reusable filesystem layers efficiently.

Medium

2. Multi-Stage Dockerfile OptimizationBuilding minimal, secure distroless and scratch production images.
4. Container Networking and VolumesConnecting services and persisting data beyond a container lifetime.
5. Container Security and Runtime LimitsReducing container privilege and blast radius.