Install RethinkDB on Ubuntu 14.04

RethinkDB is an open-source non-SQL database for realtime web applications. It pushes JSON to the web application in realtime and makes the JSON querying much simplified. Therefore, the web application becomes much more stable and responds much faster. It is very easy to install and run RethinkDB on a Linux VPS. Today we will show you how to do that on Ubuntu 14.04.