In this Linux Escape Room walkthrough, I’m tackling Level 11, and the whole theme is environment variables—specifically how a variable can hold a “key” you can use inside a container (or any VM) to unlock the next step. If you’re new here, the Escape Room is just a set of Docker containers where each tag maps to a level. I show you how to pull and run the level you want (Level 11 in this case) straight from Docker Hub, then use the built-in help prompt to figure out what you’re actually hunting for. Once I see the hint that there’s an environment variable named KEY (all caps), I walk through the basic bash pattern for reading env vars: echo plus the dollar sign to reference the variable name. From there, you’ll see the value of KEY is itself another key, which I then feed into the provided script to get the final escape key. The main takeaway is simple but important for homelab/DevOps work: environment variables are global to the container/VM environment, and you can reference them from scripts and commands anywhere you need. This level is a quick, practical way to build that muscle memory.