Basic ping script

Rev.C · 01-29-2007, 12:11 PM

I just started out with bash scripting and decided to write a simple ping program that pings my network and record the host ip address. The program works but since it ping every host once, it takes to much time. Is there another (simple) way that the program ping every host but faster?

Thanks

Code:

#!/bin/bash

for ((n=0 ; n < 255 ; n+=1))
do
	ip=192.168.2.$n
	if ping -c 1 -w 1 $ip
	   then
		host=&ip
        echo $host>>livehost
        fi
done

marozsas · 01-29-2007, 12:38 PM

It depends for what you are pinging an host.

There is the fping program. It could be used in your scripting not inside a loop, but specifying the range of ips to ping, in just one command.
There is the nmap program too, which is used as a network discovery tool. It can check if a host is up, not just sending ICMP packets but sending half-protocol and guessing the status without complete the protocol.
And there is the nice arpalert tool, which uses the ARP protocol to create a list of hosts in your site, and send alerts when a new host is plugged in your network.

I hope one of theses can satisfy your requirements.