title: How to save file under different name in vi
body: <p>I am frequently editting a file in <code>vi</code> and I want to save it under a different name than the name that I opened it under.</p>
  
  <p>I have tried saving like this:  <code>:w &gt;&gt; new_file_name</code> but I ALWAYS get <code>E212: Can't open file for writing</code>.  </p>
  
  <p>What is the correct way around this?</p>