title: git push >> fatal: no configured push destination
body: <p>I'm still going through some guides on RoR and I'm stuck here at <a href="http://ruby.railstutorial.org/chapters/a-demo-app#sec:2.3.5">Deploying The Demo App</a> </p>
  
  <p>I followed instructions:</p>
  
  <blockquote>
    <p>With the completion of the Microposts resource, now is a good time to push the repository up to GitHub:</p>
  
  <pre><code>$ git add .
  $ git commit -a -m "Done with the demo app"
  $ git push
  </code></pre>
  </blockquote>
  
  <p>What happened wrong here was the push part.. it outputted this:</p>
  
  <pre class="lang-none prettyprint-override"><code>$ git push
  fatal: No configured push destination.
  Either specify the URL from the command-line or configure a remote repository using
  git remote add &lt;name&gt; &lt;url&gt;
  git push &lt;name&gt;
  </code></pre>
  
  <p>So I tried following the instructions by doing this command:</p>
  
  <pre class="lang-none prettyprint-override"><code>$ git remote add demo_app 'www.github.com/levelone/demo_app'
  fatal: remote demo_app already exists.
  </code></pre>
  
  <p>So I push:</p>
  
  <pre class="lang-none prettyprint-override"><code>$ git push demo_app
  fatal: 'www.github.com/levelone/demo_app' does not appear to be a git repository
  fatal: The remote end hung up unexpectedly
  </code></pre>
  
  <p>What can I do here? Any help would be much appreciated.</p>