title: MySql server PID not found
body: <p>I have CentOS 6.4 with NGINX.</p>
  
  <p>When I try to <code>start/stop/restart</code> mysql server <code>(/etc/init.d/mysqld restart)</code> I get this error:</p>
  
  <pre><code>MySQL server PID file could not be found!                  [FAILED]
  Starting MySQL..The server quit without updating PID file ([FAILED]/mysql/mysqld.pid).
  </code></pre>
  
  <p>What can I do to solve this problem?</p>
  
  <p>Thanks!</p>