title: can't launch spyder from terminal ubuntu 16.04
body: <p>For some reason spyder can't launch on my linux machine (running ubuntu 16.04) via the terminal.
  When I type spyder in a terminal it says that spyder is not installed.
  However I am able to launch spyder via the graphical interface. please I am trying to figure out what's the problem.
  on my personal directory I have two folders: .spyder2 and other called .spyder2-py3</p>