Were you able to fix your root access issue? I used the script in CentOS 7 minimal installation in AWS and IsaabelPBX is now working but I've lost root access. sudo su - asks for root password.
[centos@ip-172-31-29-85 ~]$ sudo su -
We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:
#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.
[sudo] password for centos: