# Advanced usage

## Notification in cron

Cronjobs are usually cli script. But JoliNotif's Unix/Linux notifiers are gui
applications. This means you need to specify the display where the notification
will be sent.

You can achieve this by setting the `DISPLAY` environment variable in your
cronjob:

```
* * * * * env DISPLAY=:0 php /path/to/your/script
```

> **Note**: On some system, you may also need to run `xhost +local:`. For more
> information, please have a look at [https://help.ubuntu.com/community/CronHowto#GUI_Applications](https://help.ubuntu.com/community/CronHowto#GUI_Applications)

## Next readings

Previous pages:

* [Notifier](03-notifier.md)
* [Notification](02-notification.md)
* [Basic usage](01-basic-usage.md)
* [README](../README.md)
