This step is just downloading and imaging the card. I use SD formatter to be able to format the cards and WinDisk Imager. I do not want to go into to much detail as there are lots of tutorials on how to do this. If you are working on a net server then you should know how to do this part by now. Below is a link to the image as of June this year for Unbuntu on Odroid. This tutorial is specifically for the Odroid with Arm processors. This image will not work with Windows or Mac machines. There are plenty of Unbuntu images for those processors.

http://odroid.in/ubuntu_14.04lts/