smartctl:tldr:d2221

This command is a Linux command used to get the health status of a hard drive using the SMART (Self-Monitoring, Analysis, and Reporting Technology) system. Here is an explanation of the individual components:

• sudo: This is a command used in Linux to execute another command with administrative or root privileges. It allows the user to perform actions that normal users are not allowed to do. In this case, it is used to execute the smartctl command with elevated privileges.

• smartctl: This is the command-line utility used to monitor and control hard drives that support SMART. SMART is a technology used by hard drives to monitor their internal health by analyzing various attributes, such as temperature, seek error rate, and more.

• --health: This option is used to request the SMART health status of the specified hard drive.

• ${-dev-sdX}: This part of the command is a placeholder for specifying the hard drive device to be checked. The device name should be substituted with the actual hard drive identifier. For example, if you want to check the health of the first hard drive (sda), you would replace ${-dev-sdX} with /dev/sda. The actual device identifier depends on your system configuration.

To summarize, this command uses smartctl with administrative privileges to retrieve the health status of a specified hard drive using SMART technology.