title: What is the access time in Unix
body: <p>I want to know what access time is. I searched in the web but got the same definition:</p>
  
  <blockquote>
    <p>read - gets changed</p>
  </blockquote>
  
  <p>I know with <code>touch</code> we can change it. Could anyone explain me more about it with an example how it is changed?  And is there a way to get the creating date/time  in unix?</p>