This software can be used with any Arduino board.
Refer to the Getting Started page for Installation instructions.
ARDUINO 1.0.6 / 1.5.x / 1.6.x
Download the previous version of the current release, the
classic Arduino 1.0.x, or the Arduino 1.5.x Beta version.
Advanced Installation Procedure: This procedure is only recommended to advanced users who wish to completely re-flash the Yún including its U-Boot bootloader. These instructions on reflashing the base images are for reference only. Following them will void your Yún's warranty.
The list of available packages for the Yún is available here.
See the list of changes.