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Zero a hard drive in Linux

    Unmount the drive: (if you haven't already) 
    sudo umount /dev/sdX*
      Check with lsblk to confirm unmounting


      Write zeros with progress: 
      sudo dd if=/dev/zero of=/dev/sdX bs=4M status=progress
        status=progress displays transfer progress (e.g., bytes written).

         

        Verify drive identifier:

        Ensure sdX matches your drive to avoid data loss.

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