title: How can I clear previous output in Terminal in Mac OS X?
body: <p>I know the <code>clear</code> command that 'clears' the current screen, but it does this just by printing lots of newlines - the cleared contents just get scrolled up.</p>
  <p>Is there a way to completely wipe all previous output from the terminal so that I can't reach it even by scrolling up?</p>