sudo apt-get install nfs-kernel-server
sudo /etc/init.d/portmap restart (sudo service portmap restart)
sudo gedit /etc/exports
/opt/nfsroot *(rw,sync,no_root_squash)
sudo mount localhost:/opt/nfsroot /mnt/nfs
umount /mnt/nfs
sudo /etc/init.d/portmap restart (sudo service portmap restart)
sudo gedit /etc/exports
/opt/nfsroot *(rw,sync,no_root_squash)
sudo /etc/init.d/nfs-kernel-server restart
sudo exportfs
sudo mount localhost:/opt/nfsroot /mnt/nfs
umount /mnt/nfs