title: How to list applied Custom Resource Definitions in kubernetes with kubectl
body: <p>I recently applied this CRD file</p>
  
  <pre><code>https://raw.githubusercontent.com/jetstack/cert-manager/release-0.11/deploy/manifests/00-crds.yaml
  </code></pre>
  
  <p>With <code>kubectl apply</code> to install this: <a href="https://hub.helm.sh/charts/jetstack/cert-manager" rel="noreferrer">https://hub.helm.sh/charts/jetstack/cert-manager</a></p>
  
  <p>I think I managed to apply it successfully:</p>
  
  <pre><code>xetra11@x11-work configuration]$ kubectl apply -f ./helm-charts/certificates/00-crds.yaml --validate=false
  customresourcedefinition.apiextensions.k8s.io/challenges.acme.cert-manager.io created
  customresourcedefinition.apiextensions.k8s.io/orders.acme.cert-manager.io created
  customresourcedefinition.apiextensions.k8s.io/certificaterequests.cert-manager.io created
  customresourcedefinition.apiextensions.k8s.io/certificates.cert-manager.io created
  customresourcedefinition.apiextensions.k8s.io/clusterissuers.cert-manager.io created
  customresourcedefinition.apiextensions.k8s.io/issuers.cert-manager.io created
  </code></pre>
  
  <p>But now I would like to "see" what I just applied here. I have no idea how to list those definitions or for example remove them if I think they will screw up my cluster somehow.</p>
  
  <p>I was not able to find any information to that here: <a href="https://kubernetes.io/docs/concepts/extend-kubernetes/api-extension/custom-resources/#preparing-to-install-a-custom-resource" rel="noreferrer">https://kubernetes.io/docs/concepts/extend-kubernetes/api-extension/custom-resources/#preparing-to-install-a-custom-resource</a></p>