# Deploy an app from an Image
In this guide you learn how to deploy an app from an already existing image.
Prerequisite for this quickstart is to have the following tools pre-installed:
# Steps
Deploy the app via Knative
$ kn service apply my-demo-app --image gcr.io/knative-samples/helloworld-go
List your previously deployed Knative app
$ kn service list NAME URL LATEST AGE CONDITIONS READY REASON my-demo-app http://my-demo-app.demo.kube-plus.cloud my-demo-app-00001 2m15s 3 OK / 3 True
If you want to have a deeper look in how to build your apps or how to deploy them in a different fashion, please visit this detailed guides: