You need to define two cronjobs in your crontab. What is a cronjob / crontab?
1) Main cronjob
Create a cronjob that calls the URL www.yourdomain.com/cron every 10 minutes. If you use smaller intervals (eg. 1 min) the not_before_time defined in your cronjob configuration (table fcs_cronjobs) is executed more precisely.
A crontab line could look like this:
*/10 * * * * curl https://www.yourdomain.com/cron
Superadmins can now edit the cronjobs in the admin area (Homepage adminstration / tab “Cronjobs”) (https://www.example.com/admin/cronjobs).
An additional cronjob needs to be set up to handle the queue (responsible for generating and sending any emails, order lists and invoices).
*/5 * * * * /your-app/bin/cake queue run
Eventually you need to run cake with bash:
*/5 * * * * bash /your-app/bin/cake queue run