hi everyone,
today i was trying to "install" the Arduino IDE 1.5.6-r2 BETA to run the Arduino Due under the 64-bit version of Ubuntu 14.04. independent of having the Ubuntu-Arduino-packages installed or not the manually downloaded beta-version of the IDE did not work with the Due. during compilation an error 2 showed up: file or directory no found.
the solution is to install 32-bit libraries as described here:
in short:
sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install libc6:i386 libncurses5:i386 libstdc++6:i386