title: bash command to copy file from one computer to another
body: <p>Wasn't quite sure how to word this but let's say I've used <code>ssh</code> to remote into my friends MacBook (macbook_b) from my MacBook (macbook_a).</p>
  
  <p>What command would I use to copy a file/directory to my MacBook (macbook_a) from my friends MacBook (macbook_b)?</p>
  
  <p>Thank you.</p>