Set up a NFS server

Download debian netinst iso, burn it to a cd or a usb and install. Just the minimal install will suffice.

As root user install nfs-kernel-server package.

apt-get install nfs-kernel-server

Modify the /etc/exports file adding a line. You can also edit it with nano.

echo "/home/tftp *(ro,async,no_subtree_check)" >> /etc/exports

Now every other machine in our LAN can read our tft-root folder via NFS. Keep in mind that "/home/tftp" folder must exist. You can add as many folders as you want.

Update servers configuration

exportfs -a