bootstrap for arduino yun and updar automatically atmega

Official Hardware Classic Yún
1

Hello

I have two questions:

  1. Is it possible to do a debootstrap on arduino yun and derivatives?
    I obviously mean the linux part (linino or openwrt).

  2. is it possible to update the micro component (atmega) starting from linux without manually intervening?

2

that procedure is good for update linux :
http://wiki.dragino.com/index.php?title=Getting_Start_with_Arduino_Yun#Upgrade_via_WEB_GUI

?