Please note that the link in question is rather old. It references a package called system-config-nfs which no longer exists. It also has other outdated information as well as missing information.
FWIW, it is still easy to implement NFS. Just not by totally following the info in that link.
yes, I did not install anything, just installed the service, wrote something in /etc/exports and in /etc/fstab on the client. That is really great!
Frédéric