but my first problem was:
1- following the documentation I got stuck at this command:
((kadmin -q "addprinc -randkey nfs/nfs-server.domain") which as I understand should add a principle for the NFS I think it should be written in a different way on samba4 as it is my KDC
kadmin is the command if I am using normal kerbrous server
What is the alternative command for samba 4 and how to complete my setup of the NFS server
If you can reply with the needed steps to install NFS server and how to configure it to authenticate using kerberos authentication from Samba4 I would be thankful.