No output in bill summary

thanks Mike, looks good now. Appreciate your prompt response.

If you installed observium by install script, than place this cron entries to file /etc/cron.d/observium:

    */5 *   * * *   /opt/observium/observium-wrapper billing >> /dev/null 2>&1

    01 *    * * *   /opt/observium/billing-calculate.php >> /dev/null 2>&1

(same without root user)

Hi Mike,

Thanks for your reply.  Where do I add these?

/etc/cron.d/observium

or

/etc/crontab

and you didn't mention the one below, do I need to add it as well?

*/5 * * * * root /opt/observium/poll-billing.php >> /dev/null 2>&1

Also, do I need to reboot server or restart any service after?

It's seem you forgot to add crontab entries for billing calculate:

    */5 *   * * *   root    /opt/observium/observium-wrapper billing >> /dev/null 2>&1

    01 *    * * *   root    /opt/observium/billing-calculate.php >> /dev/null 2>&1

Look to billing docs:
https://docs.observium.org/billing/