I’m going to assume you already have nginx and php-fpm installed and running. php5-mcrypt should be installed already (it comes bundled with php5-fpm). Just for safety, apt-get install php5-mcrypt Create symlink to mods-avaliable, ln -s /etc/php5/conf.d/mcrypt.ini /etc/php5/mods-available/mcrypt.ini Enable it. php5enmod