in,discard 
                    out]<br>
                    critical level for input / output bandwidth (0 for no critical)<br>
                    unit depends on B,M,G,u options<br>
                    critical for error &amp; discard input / output in error/min 
                    (need -q)<br>
                    -s, --short=int<br>
                    Make the output shorter : only the first &lt;n&gt; chars of 
                    the interface(s)<br>
                    If the number is neg