title: Installing MongoDB on Ubuntu 16.04
body: <p>I'm using <a href="https://docs.mongodb.com/manual/tutorial/install-mongodb-on-ubuntu/#install-the-latest-stable-version-of-mongodb" rel="nofollow noreferrer">this official guide</a> to install MongoDB on my Ubuntu 16.04 (Xenial Xerus). At <code>Run MongoDB Community Edition</code> I got</p>
  
  <blockquote>
    <p>Failed to start mongod.service: Unit mongod.service not found.</p>
  </blockquote>
  
  <p>After typing <code>sudo service mongod start</code>. I just looked into <code>/var/log/mongodb</code>, and it's empty. I didn't have any other error before this problem. How can I fix this?</p>