The RAND function returns numbers from the interval [0,1), and if you need to generate numbers from another interval, you should use the following formula: =RAND() * (bâa) + a. This will return random numbers from the interval [a,b) - greater than or equal to a, and less than b.
At the time, 5.4 was made available as a beta release alongside the stable 5.3.4 release. Now that 5.4 has become the latest stable Unity release, it seems the company intends to keep the program going a beta version of Unity 5.5 is slated to debut in the near future. source.
Re: Unity keeps on freezing (stops responding) in Ubuntu 11.10. I did have a few instances of that, along with the menu bar appearing and disappearing at different times. No doubt there is a solution to it, but I need this machine as a general workhorse for business....I don't have time to fiddle around with it.