(root@redhat ~) $ subscription-manager register -h
Usage: subscription-manager register [OPTIONS]

Register the machine to the server

Options:
  -h, --help            show this help message and exit
  --proxy=PROXY_URL     proxy url in the form of proxy_hostname:proxy_port
  --proxyuser=PROXY_USER
                        user for http proxy with basic authentication
  --proxypassword=PROXY_PASSWORD
                        password for http proxy with basic authentication
  --username=USERNAME   username to use when authorizing against the server
  --password=PASSWORD   password to use when authorizing against the server
  --type=CONSUMERTYPE   the type of consumer to register, defaults to system
  --name=CONSUMERNAME   name of the consumer to register, defaults to the
                        hostname
  --consumerid=CONSUMERID
                        if supplied, the existing consumer data is pulled from
                        the server
  --org=ORG             register to one of multiple organizations for the user
  --environment=ENVIRONMENT
                        register to a specific environment in the destination
                        org
  --autosubscribe       automatically subscribe this system to
                        compatible subscriptions.
  --force               register the system even if it is already registered
  --activationkey=ACTIVATION_KEYS
                        one or more activation keys to use for registration