sv:tldr:c1a53

This command is composed of multiple parts:

1. sudo: This is a command in Unix-like operating systems that allows a user to execute a command with administrative privileges. By using sudo, the user can execute commands that would normally require root (administrative) access.

2. sv: This is a command used to control services managed by the runit service supervision suite. It is typically used to start, stop, restart, or manage other aspects of services.

3. once: This is one of the available options or subcommands of the sv command. In this case, once tells sv to start the service specified by ${path-to-service} once and then exit.

4. ${path-to-service}: This is a placeholder representing the file path to the specific service file that should be controlled by the sv command. The actual path to the service file must be provided in place of ${path-to-service}.

By combining these elements, the command sudo sv once ${path-to-service} is used to start a particular service specified by ${path-to-service} using administrative privileges just once, and then the command will exit.