As of Cacti 1.2.16 instead of using the Crontab to call on the poller, you can now use the system daemon in this case we are installing it on a Ubuntu system.
Learn more about Cacti using the below links.
Main Site: https://www.cacti.net
Documentation: https://github.com/Cacti/documentation
Forums: https://forums.cacti.net
Code: https://github.com/Cacti/cacti
