Garfinkel, Simson. <br/><br/>
Practical Unix and internet security / 
Simson Garfinkel, Gene Spafford and Alan Schwartz. 
 - 3rd  ed. 
 - Cambridge, UK. :  O'Reilly,  2003. 
 - xxix, 954  p. 
<br/><br/><label>ISBN: </label>0596003234 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>UNIX (Computer file)<br/>Computer security.