title: /bin/su: Permission denied in CentOS can not set su - root
body: <p>I'm trying to set myself as a root and once I type in <code>su - root</code> in the terminal it just give me an error saying /bin/su: Permission denied so I checked the permission in that file</p>
  
  <p><code>-rwsr-x--- 1 root wheel 24120 Mar 30 2011 su*</code></p>
  
  <p>I'm wondering why I can't use this I'm trying to install some plugin and it asks me to use root thats why I needed it.</p>