Your looking at bash scripting for this:
CODE
#!/bin/bash
ipstart=1 # start IP
ipstop=254 # stop IP
while [ $ipstart -le $ipstop ]
do
ping -q -c 1 192.168.13.$ipstart
ipstart=$((ipstart+1))
done
Sorry, but couldnt figure out how to reduce the amount of information....
Btw, i used google to figure all that out - thought it maybe something nice to know... Not sure why you didnt try....