dumpsys:tldr:6b4e0

The command "dumpsys ${service} -h" is a command used in Android devices' shell interface to gather information about a specific system service.

Here's a breakdown of each part of the command:

1. "dumpsys": This is a built-in Android command used to retrieve detailed information about various system services running on the device.

2. "${service}": It is a variable that represents the name of the system service you want to gather information about. You need to replace "${service}" with the actual name of the service you want to query. For example, if you want to get information about the battery service, you would replace "${service}" with "battery".

3. "-h": This option stands for "help" and is used to display the usage information or command syntax of the specified service. It provides a brief description of the available command options and how to use them.

In summary, the command "dumpsys ${service} -h" is used to retrieve help information about a specific system service on an Android device using the shell interface.