Why can run android and ubuntu in the same board?

Hi，all
I bought a firefly-rk3288 board in a few days ago, very surprised that it can run two systems both android and lubuntu , but I don't know how this is done, who knows its principle it ? Please help to answer, thank you!
Here is the firefly've Address: http: //en.t-firefly.com/en/firenow/firefly_rk3288/

adroid is quite similar to linux (especially used to say: linux based), ubuntu has a special arm based distribution available from that site.

Thank you for your answer.
I know android is based on linux,ubuntu and android can have the same kernel, but to be switched between the two systems to each other, this is how to achieve
thanks

Originally Posted by mad orange Thank you for your answer. I know android is based on linux,ubuntu and android can have the same kernel, but to be switched between the two systems to each other, this is how to achieve thanks

Bootmanager? It will not run at the same time and you switch between them. You will need to select when booting the device which OS to boot.

you can boot either android or ubuntu, but not both of them in the same time.

Thank you for your answer.
I found the answer on the firefly open source forum, it say: "Android had the emergency (recovery) mode, and emergency mode image is the kernel and the initial memory root file system (initramfs), it's in the recovery partition this recovery partition is the best place where Linux. " it also uses a different kernel, not as I thought to use the same kernel.The recovery.img contains lubuntu file system and kernel.The first time you start to enter lubuntu initialization is complete, after which you can switch in the two previous systems.
This is the address firefly forum, if you have a need that you can go and see:
http://bbs.t-firefly.com/forum.php?m...isplay&fid=100
Thanks again and hope that we can learn what we want!