title: set oracle user Display so i can install
body: <p>running oracle enterprise linux</p>
  
  <p>the Oracle installer keeps telling me that my DISPLAY variable isn't set. however echo display clearly prints ":0.0"</p>
  
  <p>logged in as root I am able to run xclock to launch the app, but when I "su oracle" and then run xclock it refuses</p>
  
  <pre><code>[oracle@devsebl ~] xclock
  Xlib: connection to ":0.0" refused by server
  Xlib: No protocol specified
  
  Error: Can't open display: :0.0
  </code></pre>
  
  <p>how can i give the oracle user permissions to use the display??</p>