How to ubuntu cronjob setup ?

sudo apt update

sudo apt install cron

sudo systemctl enable cron

sudo nano /etc/crontab

sudo crontab -e //add cron job

// Append the following entry.

* 1 * * * /path/to/import_exa.php

https://www.geeksforgeeks.org/how-to-setup-cron-jobs-in-ubuntu/