title: SSH tunnelling into arch box
body: <p>I have a raspberry pi running arch linux connected to the TV and want to run commands on that screen by SSH'ing from my Ubuntu machine elsewhere.</p>
  
  <p>I have tried running the command SSH -Y root@ and starting xclock as a test. However I get the following error:</p>
  
  <p>No protocol specified
  Error: Can't open display: :0</p>
  
  <p>I then tried running "export DISPLAY=:0" on the arch machine, but this doesn't solve the issue.</p>
  
  <p>I have X running fine and can see it on the TV and I have edited the file /etc/ssh/ssh_config to allow X11 forwarding.</p>
  
  <p>Anyone know what I am doing wrong?</p>
  
  <p>Many thanks</p>