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Problem Setup

I am working on a home automation system (as a side project), and I plan on using the Odroid U3 running Ubuntu 14.04 in conjunction with ROS to act as individual nodes for this system. Each node will perform different tasks, so the actual source-code housed on each device will be different. For the sake of uniformity, I would like to maintain a single custom image that I could flash on to each device. I'm not too concerned about security for the time being as the project is a demo.

Questions

Should I use dd to image the eMMC device?

to image the eMMC device? Follow up on the above, wouldn't this then force me to use the same sized memory device each time?

Is there a better way to do this?

Thanks!