On an IGEL OS device, you can view all non-closed notifications in the Notification Center.
Notification Center iconis displayed ifthe taskbar and taskbar system tray are activated (User Interface > Desktop > Taskbar and Taskbar Items; both are enabled by default).
If you do not want to see floating notifications, you can activate the Do not disturb function.
In the Notification Center, you can see
Update notifications prompting the user to reboot the device to complete the app installation. The device will be restarted automatically if the user will not react within 60 seconds; this timeout can be changed underSystem > Update > Timeout for automatical reboot in seconds.
If you do not want the user to see the dialog offering to restart the device immediately or postpone the restart, you can enableAutomatical reboot of system once app is installedunderSystem > Update.