A background service is a process that runs in the background without any user interface. It can perform tasks that don't require user interaction, such as network communication, data synchronization, or processing. To create a background service file that runs after the NetworkingManager service, you need to follow these steps:

1. Create a new service file in the appropriate directory (/etc/systemd/system) with a .service extension.

2. Edit the service file and define the necessary properties.

   • Set the ExecStart property to specify the command or script that should be executed by the service.
   • Set the After property to specify the services that the background service should start after.

3. Save the service file and exit the editor.

4. Reload the systemd daemon to update the configurations.

5. Start and enable the background service.

   • Use the systemctl start <service-name> command to start the service.
   • Use the systemctl enable <service-name> command to enable the service to start at boot.

After completing these steps, the background service will run after the NetworkingManager service.