I've just got my Pi 2 in a good state running various data collection apps, SQLite3, Apache etc and am think of up grading to the Pi 3.
I'm running the system from an external Hard drive and booting from an SD card.
I would like to upgrade the Pi2 to 3 without having to re-install all the apps, compilers etc and recompile my apps.
Is it possible to change the Pi2 to Pi3 buy just doing and apt-get update/upgrade and changing the hardware.?