switching between ChromeOS and Chrubuntu

almost one year ago I bought a Samsung ARM Chromebook, honestly I have to say this is a great product and since I have more time available to continue with several personal projects related to IT I found that at this time I continue learning about this architecture. Anyway, today I want to share a "hard method" to switch between chrubuntu and Chrome Os, here it is:

step 0: You need to install chrubuntu on your ARM Chomebook. After that you need to install cgpt as well.

step 1: From Chrubuntu, open a terminal, edit your .bashrc file and add this line:
alias chromeos='sudo  cgpt add -i 6 -P 0 -S 1 /dev/mmcblk0; sudo reboot'

save it and try it using from terminal:
chromeOs

type your password and your chromebook should start to reboot, few seconds later you should see the chromeOs welcome screen.

step 2: before login, press this keys: Ctrl+Alt+Forward (the key instead F2), you will be on a terminal, just type: chronos, after that edit your .bashrc using vim and add this line:
alias chrubuntu='sudo cgpt add -i 6 -P 5 -S 1 /dev/mmcblk0; sudo reboot'

then type exit, login again using chronos and try this typing:
chrubuntu

and that's it, I think this way it's little tricky, despite that, maybe in a near we may have a grub hybrid, the guys from google released the chromium code so there is no excuses to work improving gaps like that

anyway, let me know if you have any doubts