Failed to execute operation: Access denied
When running you get this message:
# systemctl enable nfs-server.service
Failed to execute operation: Access denied
Solution is to disable selinux or to allow for proper SELinux rules to allow for the above action:
# vi /etc/sysconfig/selinux
…
SELINUX=disabled
…
# setenforce 0
# getenforce
Permissive
Alternately see the following post for details on how to tailor SELinux rules for similar cases.
Cheers,
TK