In ExoGENI there are multiple ways that you can create custom Images.

To get a list of currently available images on ExoGENI look here:
​http://geni.renci.org:15080/registry/images.jsp

• ​Modify an existing image loaded in a VM and take a snapshot

• If you want to create an image of an OS that is not currently available in EG, or port your custom image to EG you can use VirtualBox to create and snapshot your image.
  ​http://www.exogeni.net/2014/07/creating-a-custom-exogeni-image-using-virtual-box/

• ​Use !DropBox to store your ExoGENI images

• Original - Harder way to build images:
  • Build your own image on any Linux computer by following ​these instructions
  • Add NEuca guest tools to it following ​these instructions