lk/system/cronie.md

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Various services from cron exist, e.g.
> sudo apt -y install cronie
start the cronie with
> sudo systemctl start cronie
start a cron with
> cron -e
You can run a script with:
*/10 * * * * /home/pi/script.sh
... which would run every 10 minutes.
To run something as root, do:
> sudo crontab -e
For example, you can update the database, meaning searches with 'locate' command will be faster.
> */30 * * * * /usr/bin/updatedb