how install systemd-cron ubuntu

ubuntu

systemd-cron

systemd units to provide cron daemon & anacron functionality
https://github.com/systemd-cron/systemd-cron
Install sudo apt install systemd-cron
Description:

Provides systemd units to run cron jobs in /etc/cron.hourly cron.daily cron.weekly and cron.monthly directories, without having cron or anacron installed. It also provides a generator that dynamicaly translate /etc/crontab, /etc/cron.d/* and user cronjobs in systemd units.