Simson Garfinkel <br/><br/>
Practical Unix and internet security 

 - Third edition 
 - Sebastopol  O'REILLY  2003 
 - xxx, 954p.  index, ill. 
<br/><br/><label>ISBN: </label>978-0-596-00323-4 
<br/><br/><label>Dewey Class. No.: </label>005.8GAR