# Advanced use cases

Here you will find advanced cases that are best explained with sample tracks:

<details>

<summary>Create a persistent shell session between challenges using GNU screen</summary>

Run a service in the background or keep a long-running command going between challenges with the GNU screen tool.

[Start track](https://play.instruqt.com/examples/tracks/persist-shell-session)

</details>

<details>

<summary>Configure a Virtual Machine that allows external ingress</summary>

Allow external systems to communicate with a VM.

[Start track](https://play.instruqt.com/templates/tracks/network-external-ingress)

</details>

<details>

<summary>Avoid security warnings on public access URLs</summary>

Avoid security warnings on public access URLs with external ingress.

[Start track](https://play.instruqt.com/templates/tracks/network-external-ingress)

</details>

<details>

<summary>Create an Amazon Elastic Kubernetes Service (EKS) cluster</summary>

Run an EKS cluster and a workstation with preinstalled **kubectl** and **gcloud** commands. Use it as a starting point for your own K8s-enabled tracks.

[Start track](https://play.instruqt.com/examples/inspiration-library/examples/kubernetes-cluster-eks)

</details>

<details>

<summary>Create a Google Kubernetes Engine (GKE) cluster</summary>

Run a single-zone, three-node GKE cluster and a workstation with preinstalled **kubectl** and **gcloud** commands. Use it as a starting point for your own K8s-enabled tracks.

[Start track](https://play.instruqt.com/examples/inspiration-library/examples/kubernetes-cluster-gke)

</details>

<details>

<summary>Create a multiple Kubernetes cluster</summary>

Run two k3s clusters in the same environment.

[Start track](https://play.instruqt.com/inspiration-library/example-tracks/multi-k8s-track)

</details>


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