title: Perfmon-like for Linux?
body: <p>In windows there is perfmon to monitor various performances aspects (called <em>counters</em>) of the system.</p>
  
  <p><strong>Is there a perfmon-like for Linux?</strong></p>
  
  <p>especially, in interested in...</p>
  
  <ul>
  <li>CPU usage (total/per process/in kernel)</li>
  <li>Memory usage (total/per process/in kernel)</li>
  </ul>
  
  <p>...Is it possible to store this information in files for future analysis?</p>