I need to run Arduino IDE and i would like to do it in Linux. I have never used Linux before. I would like to find some live cd or whatever which i can install in MacBook Pro to external hard drive and then install Java and then Arduino IDE. There is not internet available in this MBP so installations should work without net. What Linux i should choose and where i can download it? What if i would like to have both Yosemite and Linux in same external hard drive?