install.sh and wait for the process to finish. If you don't find the option to run the script from the contextual menu, you have to open a Terminal window and move into the arduino-1.6.x folder. The installation process will quickly end and you should find a new icon on your desktop. Right click on it and choose Run in Terminal from the contextual menu. Open the arduino-1.6.x folder just created by the extraction process and spot the install.sh file. The file is compressed and you have to extract it in a suitable folder, remembering that it will be executed from there. Clicking on the chosen version brings you to the donation page and then you can either open or save the file. It is very important that you choose the right version for your Linux distro. You can choose between the 32, 64 and ARM versions.

Get the latest version from the download page. There are no specific instructions needed for the different distributions of Linux (e.g. The Linux build of the Arduino Software (IDE) comes in different packages depending on your system architecture. This document explains how to install the Arduino Software (IDE) on Linux machines. Install the Arduino Software (IDE) on Linux

How to download arduino ide software