Howtogeek posted a guide about transferring a drive image over a network using Ubuntu Live CD

Drive images are great to have, but hard to store if you don?t have a big external hard drive. We'll show you how to create and transfer a drive image to another computer in one step.
The Ubuntu Live CD includes both utilities that we need for the source and destination computers out of the box dd and ssh.

We're fans of dd, having used it to clone hard drives and make drive images locally in the past. However, putting an image on an external drive and then transferring that to a different computer is a pain. Using a combination of dd and ssh lets us transfer a drive image from one computer to another in one step, requiring no local storage in between.

  Transfer a Drive Image Over a Network Using an Ubuntu Live CD