Error: You have to install PHP mcrypt extension! - Oprekan Nikko

apt-get install nginx
apt-get install php5-mcrypt mcrypt php5-mysql php5-fpm php5-cli
updatedb
locate mcrypt.ini
locate mcrypt.so
ln -s /etc/php5/mods-available/mcrypt.ini /etc/php5/fpm/conf.d/20-mcrypt.ini
ln -s /etc/php5/mods-available/mcrypt.ini /etc/php5/cli/conf.d/20-mcrypt.ini
php5enmod mcrypt
service php5-fpm restart
sudo service nginx restart