Plesk is a web based control panel with a complete set of features for managing the websites. The services on the Plesk server can be managed by using the service utility. This utility can be used to display a list of available services, queries the current running status of a service, starts, stops or restarts a service, and also specifies the information which is to be included in the list of available services.
The following command is used to view the list of available services
plesk bin service --list
or
plesk bin service -l