I am trying to make a bash script to scan subnets to see what hosts are available. Is it correct that you can not make the ping command time out less than a second? The script below works, but can take up to 255 seconds which is a bit long Is there a way to solve this using bash only?

<code>
subnet=192.168.2.
addr=1
while [ $addr -lt 256 ]; do
ping -c 1 -t 1 $subnet$addr > /dev/null && echo Found $subnet$addr
let addr=addr+1
done
</code>