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There is a Docker install of Rancher:

sudo docker run -d --restart=unless-stopped -p 80:80 -p 443:443 --privileged rancher/rancher

Rancher is not an application that is installed on top of an operating system like a web browser. Rancher is installed on top of kubernetes. The docker method described above will run k3s kubernetes in a docker container and install Rancher on top of that. You can run Rancher anywhere you can run kubernetes.