Learn DevOps by playing games

Git Branching

Simulators for Linux Foundation Exams

KodeKloud Engineer. Specific role simulation

TryHackMe. Many rooms cover Linux, Docker, K8s security from an offensive/defensive perspective

Hack The Box. Similar to TryHackMe

OverTheWire Wargames. Classic command-line challenges

AWS Cloud Quest

Play with Docker. Interactive Docker sandbox

Kubernetes Goat. Deliberately vulnerable K8s cluster to learn security