1. Says "under LINUX" so there should be no problems there, try it and take note of any error messages, you made need to install some additional libraries or something to satisfy dependencies, this isn't too hard.
2. Redhat and Mandrake both use RPM package format so installing it should go okay, again look at any error messages because there may be something this program requires that is in Redhat by default but not Mandrake, if so it should be pretty easy to track it down and install it.
3. I think this one will be a problem, I don't know too much about SunOS but I think its different enough from Mandrake that this won't work. I could be wrong though, no harm in trying.... (we hope