Ray, Deborah, <br/><br/>
Unix and Linux 
by Deborah Ray and Eric Ray 
 - 5th ed. 
 - New Delhi  Pearson  2016 
 - xii; 396 p.:  24 cm. 
<br/><br/><label>ISBN: </label>9789332541269 
<br/><br/><label>Dewey Class. No.: </label>005.432