"Is this" is not necessarily a question construct.

Consider the following:


  The answer you've been looking for is this one right here.
  
  The problem is this: We have no money.
  
  When it's this time of day, no one's around to help us


But that's just a quick side-note. When not only is used at the beginning of a clause, that clause gets turned into a question. Imagine writing the sentence out like so:


  Not only is it true, it's funny too.
  
  Is it true? Yes. Not only that, it's funny as well!


Let's try it in a different example:


  Not only can he play the violin, he can play the tuba!
  
  Can he play the violin? Yes. Not only that, he can play the tuba!


Question-like structure (word order) in non-question sentences
I'm new to Ubuntu and Linux and I just downloaded mupen64plus 1.99.5 and it came as a *.tar.gz file. I found some guides about how to install a .tar.gz file with the terminal but it doesn't work. How can I install it?
