No apache MPM package installed - debian/ubuntu

apt-get purge apache2-mpm-prefork
apt-get install apache2-mpm-prefork
/etc/init.d/nginx stop
service apache2 start
cp -arp /root/apache2/mods-available/php5* /etc/apache2/mods-available/
cp -arp /root/apache2/mods-enabled/php5* /etc/apache2/mods-enabled/
service apache2 start
apt-get install libapache2-mod-php5