$ curl https://oauth:`oc whoami -t`@<private-docker-registry-URL>/v2/_catalog --cacert <CA-certificate-path>
$ curl https://oauth:`oc whoami -t`@<private-docker-registry-URL>/v2/_catalog --insecure
$ curl -x http://<proxy-URL>:8080 -L https://www.openshift.com
$ curl -x http://<proxy-URL>:8080 -L https://sso.redhat.com
$ curl -x http://<proxy-URL>:8080 -L https://www.docker.com