title: ubuntu: change timezone to UTC does not affect the time of syslog?
body: <p>I changed the time zone of my server (Ubuntu 12.04) to UTC via:</p>
  
  <pre><code>echo 'UTC' &gt; /etc/timezone
  dpkg-reconfigure --frontend noninteractive tzdata
  </code></pre>
  
  <p>When running <code>date</code>, I can see the time is now in UTC.
  However, on /var/log/syslog, it still displays the time with the previous setup timezone and not UTC. Why ?
  How to make it take effect on the whole system? Reboot?</p>
  
  <p>Thanks.</p>