Install kubuntu-notification-helper by entering the following commands in the terminal:
sudo apt update sudo apt install kubuntu-notification-helper
Description:
Kubuntu system notification helper
Kubuntu Notification Helper is a daemon that presents various notifications to the user. It uses the KDE Daemon system as a base and presents the notifications using the KDE Notification system. It also includes a System Settings module for configuring the daemon. Kubuntu Notification Helper is lightweight and fully integrated with KDE. . Current features include: - Notifications for Apport crashes. - Notifications for upgrade information, when available. - Notifications for the availability restrictively-licensed packages. - Notifications for when upgrades require a reboot to complete. - All notifications can be hidden temporarily or permanently.
Homepage: https://www.kubuntu.org
Version: 18.04ubuntu1
Section: universe/kde