title: What's the opposite of head? I want all but the first N lines of a file
body: <p>Given a text file of unknown length, how can I read, for example all <em>but</em> the first 2 lines of the file? I know <code>tail</code> will give me the last N lines, but I don't know what N is ahead of time.</p>
  
  <p>So for a file</p>
  
  <pre><code>AAAA
  BBBB
  CCCC
  DDDD
  EEEE
  </code></pre>
  
  <p>I want </p>
  
  <pre><code>CCCC
  DDDD
  EEEE
  </code></pre>
  
  <p>And for a file</p>
  
  <pre><code>AAAA
  BBBB
  CCCC
  </code></pre>
  
  <p>I'd get just</p>
  
  <pre><code>CCCC
  </code></pre>