title: Unable to source .screenrc, it says command not found
body: <p>I am trying to get tabs in my screen using .screenrc, but while sourcing, it says command not found. It is on ubuntu14.04. I have screen installed. I can create screen but just unable to get tabs details using screenrc.</p>
  
  <pre><code>machine:~$ cat .screenrc
  caption always caption string "test caption"
  hardstatus string "%{= g} %{= w}%-Lw%{=r}%n%f* %t%{-}%+LW"
  
  machine:~$ source .screenrc
  caption: command not found 
  hardstatus: command not found
  </code></pre>
  
  <p>Can someone let me know how to resolve this?</p>