Here are my sample unit files extracted from my real ones. Firstly, here is an example of Service A:
[Unit] Description=Service A After=network.target [Service] Type=notify NotifyAccess=all ... [Install] WantedBy=multi-user.target Here is an example of Service B: [Unit] Description=Service B After=servicea BindsTo=servicea [Service] ... [Install] WantedBy=multi-user.target