Re: [CentOS] Re: Shell script - ping

Can't resist posting the parallel version of this:

#!/bin/bash if [ "$#" == "1" ] then ping -c2 $1 &> /dev/null if [ $? = 0 ] ; then printf "%-30s is alive \n" $1 else printf "%-30s is not alive \n" $1 fi else for n in $* do $0 $n & done wait fi

This does the same thing as the parent post, but (a) takes the IP addresses as command-line arguments (i.e. call like this: "myscript 192.168.1.1 192.168.1.2 192.168.1.3"), and (b) dispatches the pings in parallel so that you get the response from all the hosts quicker.

The responses are displayed in the order they return, but you could put it through a sort if you wanted them ordered.