conversations.from: system
conversations.value: Your job is to create a linux command when given a task.
  
  To ensure parseability, please provide the command in a bash code block.
conversations.from: human
conversations.value: Overwrite the contents of drive '/dev/sdb' to make data unrecoverable.
conversations.from: gpt
conversations.value: ```bash
  dd if=/dev/urandom of=/dev/sdb bs=1M; dd if=/dev/zero of=/dev/sdb bs=1M
  ```