blkdiscard:tldr:d54bb

The command "blkdiscard /dev/${device}" is used to discard all the data present on a specific block device in a Linux environment.

Here is a breakdown of the command:

• "blkdiscard" is the name of the command-line utility that is used to discard blocks on a block device.
• "/dev/${device}" is the path to the block device you want to discard. In Linux, all devices are treated as files, and "/dev" is the directory where these device files are located. "${device}" represents a variable that should be replaced with the actual name of the device you want to discard (e.g., "/dev/sda" for the first hard drive).

When you execute this command, all data on the specified block device will be permanently discarded or erased. This operation is irreversible and should be used with caution, as it will erase all the data on the device, making it impossible to recover. It is commonly used when you want to securely erase a storage device before selling or repurposing it.