We have followed the above link: https://certbot.eff.org/#ubuntutrusty-apache
Success: wget https://dl.eff.org/certbot-auto
chmod a+x certbot-auto
But, getting the error while: $ ./certbot-auto
We are getting the below error:
Failed authorization procedure. www.dev.orabrush.com (tls-sni-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: DNS problem: NXDOMAIN looking up A for www.mydomain.com
Please let us know the steps to update the certificate.