How to Add or Fix the Cronjobs tab in your Virtualmin running CentOS or most other Systems.
If your Virtualmin >> System >> Scheduled Cron Jobs tab does not contain the Hourly, Daily, Weekly, Monthly Cronjobs there is an easy fix.
Simply open this file and add the lines below.
vim /etc/crontab
# run-parts 31 * * * * root run-parts /etc/cron.hourly 58 0 * * * root run-parts /etc/cron.daily 10 2 * * 0 root run-parts /etc/cron.weekly 25 5 29 * * root run-parts /etc/cron.monthly
This should add them to your Virtualmin.
How to: CentOS Virtualmin Add Cronjob – Hourly, Daily, Weekly, Monthly Missing – Fix