title: tableau server error: Unexpected end of file from server
body: <p>I'm trying to install the tableau server on ubuntu server.
  Since 80 port is already bounded by other process, I start server on <code>port 8850</code>. I tried to create an initial user by <code>tabcmd initialuser --server 'localhost:8850 --username "code" --password="erDsd3ffds2!"</code>
  But it said "<code>java.net.SocketException:Unexpected end of file from server</code> 
  How can I fix it?</p>