title: Apache2 restart failed on ubuntu
body: <p>when i am trying to restart apache server from ubuntu, its showing as fail... 
  i typed the command as,
  $service apache2 restart</p>
  
  <p>it shows,</p>
  
  <ul>
  <li>Restarting web server apache2                                         [fail]</li>
  </ul>
  
  <p>when i checked in log file, in var/apache2/errorlog the description provided is,</p>
  
  <blockquote>
    <p>[mpm_prefork:notice] [pid 1263] AH00163: Apache/2.4.7 (Ubuntu) 
    PHP/5.5.9-1ubuntu4.5 configured -- resuming normal operations</p>
  </blockquote>