title: Difference between su oracle and su - oracle?
body: <p>Simple question, what is the difference between </p>
  
  <p><code>su oracle</code> and <code>su - oracle</code></p>
  
  <p>I am not sure what is the significance of <code>-</code> in both the commands. </p>
  
  <p><strong>Update:</strong></p>
  
  <p>After doing su oracle, tried which sqlplus but it was not identified but by doing <code>su - oracle</code>, sqlplus environment was set. </p>