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hdparm:tldr:2c1a4

hdparm: Display the device's current power mode status.

hdparm

$ sudo hdparm -C /dev/${device}

try on your machine

The command "sudo hdparm -C /dev/${device}" is used to check the power state of a specified device in Linux.

Here's a breakdown of the command components:

"sudo" is a command that allows a user with superuser privileges (usually the system administrator) to execute commands as another user, typically the root user. It is used here to run the subsequent command with elevated privileges.
"hdparm" is a command-line utility in Linux used to control and manage hard disk drive (HDD) and solid-state drive (SSD) settings. It provides various options to manipulate the device parameters.
"-C" is an option or parameter flag in hdparm that stands for "check power mode". It is used to query the power state of the specified device.
"/dev/${device}" refers to the device name or path of the block device (e.g., hard drive or SSD) you want to check the power state. The "${device}" placeholder implies that you need to replace it with the actual device name. For example, if you want to check the power state of the first SATA drive, you would substitute "${device}" with "sda" to get "/dev/sda".

In summary, running "sudo hdparm -C /dev/${device}" allows you to determine the power state (active or standby) of a specific device in Linux by leveraging the hdparm utility and providing the relevant device path.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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