Do Not - Ban lo

Don't ban lo in the /etc/network/interfaces

lo - local host

otherwise NFS won't work.

HowTo - NFS

Installation

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https://help.ubuntu.com/community/SettingUpNFSHowTo#NFSv4_quick_start

Setting up IP addresses

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# ifconfig eth0 192.168.0.x

Server : 192.168.0.8

Client1: 192.168.0.7

Server

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1. Install the nfs-kernel-server packet
I used synaptic package manager in Ubuntu 10.04 to install it.


2. Change /etc/exports file [1]

/home/synrg/server 192.168.0.7(rw,no_root_squash,async)

I also changed /etc/hosts.allow file for permission concern (I don't know whether it is necessary.)

portmap:ALL

3. Start nfs server
You might need to stop and start again if it's already running.

# bash /etc/init.d/nfs-kernel-server start

Client

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1. Mount from server

# mount 192.168.0.8:/home/synrg/server /mnt/synrg/

Files written into /mnt/synrg folder on the client machine will simultaneously transferred to the /home/synrg/server folder on the server machine.

References

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[1]http://nfs.sourceforge.net/nfs-howto/ar01s03.html