/var/spool/cron/crontabs/root
crontab -e
cron
, crontab
, systemctl list-timers
, anacron, Kubernetes scheduler, Systemd services, CronJobsStack
, cron.schedule
, crontab -l
, 0x004b
, at, /etc/cron.deny, /etc/cron.allow, /etc/crontab, /var/spool/cron/crontabs/