Install IonCube on Ubuntu

//download ioncube
wget http://downloads3.ioncube.com/loader_downloads/ioncube_loaders_lin_x86-64.tar.gz

//blow it up
tar xvfz ioncube_loaders_lin_x86-64.tar.gz

//find the php extension dir
php -i | grep extension_dir

//put php version in a variable
PHP_VERSION=$(php -r "echo PHP_MAJOR_VERSION.'.'.PHP_MINOR_VERSION;")

//use that variable to get the right .so file
sudo cp "ioncube/ioncube_loader_lin_${PHP_VERSION}.so" /path/to/extension/dir/

//restart things
service apache2 restart
service php5-fpm restart