To start the execution of scheduler tasks using the CLI, you need to connect to your server via SSH and run the command:

php /path/to/site/public_html/cli/joomla.php scheduler:run

If you need to run a specific task, you can view the list using the command

php /path/to/site/public_html/cli/joomla.php scheduler:list

and then run the task by its id

php /path/to/site/public_html/cli/joomla.php scheduler:run --id=XXX

Starting from Joomla 4 it has a Symfony console under the hood. Read more in Joomla Community Magazine article: Joomla 4: A Powerful CLI Application.

Joomla Community resources

• https://joomla.org/
• Joomla Community chat in Mattermost (read more)