http://nfs.sourceforge.net/nfs-howto/ar01s03.html

If you’re happy to ignore security concerns the quick way to set up an NFS server on your network is as follows.

1. Add an exports file. This one allows all computers on my local network full access to the transit directory. The `insecure` option is required for Macintoshes to connect.

rossetti@Wakatipu:~$ sudo mkdir /media/backup/transit/
rossetti@Wakatipu:~$ sudo chmod 777 /media/backup/transit/
rossetti@Wakatipu:~$ cat /etc/exports 
/media/backup/transit	10.0.0.0/255.255.255.0(rw,insecure,sync)

2. Install and start the server. On Debian you can

rossetti@Wakatipu:~$ sudo aptitude install nfs-user-server

3. Connect from a Macintosh
Go > Connect to Server
nfs://wakatipu.local/media/backup/transit

Connect from Knoppix Live CD

knoppix@Knoppix:~$ sudo mkdir /media/transit
knoppix@Knoppix:~$ sudo mount -o nolock 10.0.0.7:/media/backup/transit /media/transit