I only installed Zorin last week and I've been getting used to it. Trying to install Java, I went to the terminal, put in su and was prompted for the password. I put it in and get "Authentication failure." I know, do I have my password right? Well, I wish I could make sure in Zorin, but I can't, because can't see them. The prompt doesn't even move when I type, and I don't know if that's normal or not.
But never mind that, I have tried to put it in between ten and fifteen times now, even reciting the letters numbers and symbols as I do. Yes, I have made sure the caps lock isn't on. Authentication works everywhere else, just not at the prompt for the "su" command.