http://www.htpcbeginner.com/install-configure-nfs-server-ubuntu/
https://help.ubuntu.com/community/SettingUpNFSHowTo

nfs server (myroutergui)
sudo mkdir /nfsdisk
sudo chmod 777 /nfsdisk
sudo apt-get install nfs-kernel-server
sudo cp -a /etc/exports /etc/exports.backup
sudo nano /etc/exports
/nfsdisk   10.0.100.0/24(rw,async,insecure,no_subtree_check,nohide)
ctrl+x to save
sudo exportfs -ra
sudo service nfs-kernel-server restart

nfs client (PSU12-Sritrang server)
bash /root/scripts/makezone.sh 2
apt-get install nfs-common 
mount -t nfs -o proto=tcp,port=2049 10.0.100.1:/nfsdisk /var/www/cloning/zone2
echo hello > /var/www/cloning/zone2/hello.txt
ls -l /var/www/cloning/zone2
umount /var/www/cloning/zone2
nano /etc/fstab
10.0.100.1:/var/www/cloning/zone2  nfs  auto 0 0