service:handle

The given command "service ${service_name} ${select}" is using variables to refer to the service name and an option or command to perform on that service. Here's an explanation of each component:

• "service" is a command in Linux and Unix-like operating systems that is used to control system services or daemons. It can be used to start, stop, restart, enable, disable, and check the status of services.
• "${service_name}" is a placeholder variable that needs to be replaced with the actual name of the service you want to work with. For example, if you want to stop the Apache HTTP server, you would replace "${service_name}" with "apache2". So, the command would become "service apache2 ${select}".
• "${select}" is another placeholder variable that should be substituted with an option or command to perform on the specified service. The available options depend on the specific service and the system you are using. Some common options are "start", "stop", "restart", "status", "enable", and "disable". For example, if you want to start the service, you would replace "${select}" with "start". So, the command would become "service apache2 start".

In summary, by using the "service" command with variables for the service name and the desired action, you can control various services on a Linux or Unix-like system.