Secure Admin must be enabled to access the DAS remotely.



Error:
     Secure Admin must be enabled to access the DAS remotely.

Description:
     The administration is not enabled to be used remotely, therefore requires to be enabled.
  
Solution:
       ./asadmin --host [host] --port [port] enable-secure-admin


Reference:
http://docs.oracle.com/cd/E18930_01/html/821-2435/gkomz.html

Process already using the admin port 4848



Error:

    there is a process already using the admin port 4848

Description:

     In reviewing the ports used, this port does not appear therefore made me   think it was a generic error.

Solution:
 
     The check the /etc/ hosts file I found that the IP address was misspelled.
     The IP address is changed and start again and it worked correctly.