title: Running "screen" without additional permissions on WSL
body: <p>I'm trying to run the "screen" utility on Windows Subsystem for Linux on Windows 10 (Version 1703, OS Build 15063.483).</p>
  
  <p>It seems that I need additional permissions to run it (it works if I "sudo" it), but I don't understand why that is necessary. </p>
  
  <p>What is the recommended way to set this up? </p>
  
  <p>Is there some reason why this isn't the default set up?</p>
  
  <pre><code>$ screen
  Cannot make directory '/var/run/screen': Permission denied
  </code></pre>