(root)@sys-ubuntu:/etc/apache2# chown -R puppet:puppet /usr/share/puppet/rack/puppetmasterd/config.ru

(root)@sys-ubuntu:/etc/apache2# /etc/init.d/apache2 restart
 * Restarting web server apache2                                                                                             ... waiting .                                                                                                       [ OK ]

(root)@sys-ubuntu:/etc/apache2# ps -ef | grep puppetmasterd
puppet   27998     1 41 17:29 ?        00:00:00 puppetmasterd