smartctl:tldr:d0c98

The command you provided is:

sudo smartctl --capabilities ${-dev-sdX}

Let's break it down:

1. sudo: It is a command that allows you to execute another command with administrative privileges (as the superuser or root user).

2. smartctl: It is a utility to monitor and analyze SMART (Self-Monitoring, Analysis, and Reporting Technology) data of storage devices such as hard drives and solid-state drives.

3. --capabilities: It is an option or flag of the smartctl command that displays the capabilities and features of the specified storage device.

4. ${-dev-sdX}: This is a placeholder for the device identifier. In the command, -dev-sdX indicates the device path for a specific storage device. The "X" represents a letter like "a," "b," "c," etc., and usually indicates individual disk drives (e.g., /dev/sda, /dev/sdb, etc.). The ${} syntax suggests this is a parameter or variable, but it seems to be misplaced in this command. It should be outside the braces if intended to be used as a variable.

To use this command, you should replace ${-dev-sdX} with the actual device identifier you want to analyze (e.g., /dev/sda). It is important to note that manipulating storage devices with SmartCTL requires administrative privileges, hence the usage of sudo.