ledctl:tldr:c8cb2

This command is using the "ledctl" utility with the "sudo" command, which grants administrative privileges to execute the following command. The purpose of "ledctl" is to interact with the LED (Light Emitting Diode) subsystem of the Linux kernel, allowing you to control and manage the LEDs on your system.

In this specific command, the "ledctl" utility is being used to turn off the LED for certain devices identified by their device paths. The devices being targeted are "sda" and "sdb". The "-dev-sda" and "-dev-sdb" are placeholders representing the device paths for the actual devices.

The "---" represents that there could be more devices listed here, which have been omitted for brevity.

By setting "off" as the action, this command instructs the "ledctl" utility to turn off the LEDs for the specified devices.