title: Ubuntu - change tmux 1.8 to tmux-next 1.9
body: <p>After I tried install few plugins for tmux I found that my tmux version is 1.8. </p>
  
  <p>Following steps from this answer I install tmux 2.1: <a href="https://stackoverflow.com/questions/25940944/ugrade-tmux-from-1-8-to-1-9-on-ubuntu-14-04">Ugrade tmux from 1.8 to 1.9 on Ubuntu 14.04</a>
  (I didn't found  tmux=1.9a-1~ppa1~t and instead install tmux-next and substitute link in usr bin with <code>sudo ln -sf $(which tmux-next) /usr/bin/tmux</code></p>
  
  <p>Tmux works nicely, but didn't load my config. I tried tmux source, but now I should <code>tmux source</code> every time I use tmux.</p>
  
  <p>And after all I get this errors:</p>
  
  <pre><code>unknown option: mode-mouse
  unknown option: mode-mouse
  unknown option: mouse-select-pane
  unknown option: mouse-resize-pane
  unknown option: mouse-select-window
  unknown option: mode-mouse
  unknown option: mode-mouse
  </code></pre>
  
  <p>Is tmux-next the same tmux? And what I should do to load <strong>.tmux.conf</strong> automatically? </p>