If the system is using systemd, it will run as a systemd service, triggered by time.
If you run systemctl status certbot.timer you will get the status of the service that triggers certbot from systemd.
This is why the cron script is configured not to run renewal if systemd is detected on the machine.
Automated Renewals Most Certbot installations come with automatic renewals preconfigured. This is done by means of a scheduled task
which runs certbot renew periodically.
If you are unsure whether you need to configure automated renewal:
Review the instructions for your ...