network

On the receiving machine (disk sda MUST be unmounted, e.g. by booting from a live CD or USB stick):
netcat -l -p 4778 | dd of=/dev/sda

On the sending machine (disk sdb MUST be unmounted, e.g. by booting from a live CD or USB stick):
dd if=/dev/sdb | netcat 192.168.0.4 4778

(-l listen; -p port)

Karmic Koala
To add a permanent static route to a Karmic Koala system with one NIC, you need to edit the
/etc/network/interfaces file. The following section needs to be replaced:

# The primary network interface
auto eth0
#iface eth0 inet dhcp

Modify as follows:
# The primary network interface
auto eth0
iface eth0 inet dhcp
up route add -net 10.8.0.0 netmask 255.255.255.0 gw 192.168.0.3
down route del -net 10.8.0.0 netmask 255.255.255.0 gw 192.168.0.3