Wonderful @sahsanu 
. Solved by adjusting the etc/resolv.conf file and removing localhost ( 127.0.0.1 ) from the list. Thank you for your patience with this Padawan
Then another problem arose, already addressed here on this forum, The false positive of Spamhaus.org. Colleague @Felix addressed this case in the following post, but it was not clear to me what he did in the /etc/bind/bind.named.conf file to circumvent the situation. I would really appreciate it if could share, to avoid me turning off Spamhaus.org from my configuration 
. Post =(Rejecting incoming messages - zen.spamhaus.org)
Thank you very much