A script that pings simultaneously a list of ip addresses.

parallel_ping.sh

#!/bin/bash

readonly ARGC=$#
readonly ARGV=( "$@" )

readonly PROG_NAME=$(basename "$0")

usage()
{
    echo "Usage: $PROG_NAME <ip-list>"
    exit 1
}

ping_it()
{
    local address="$1"

    local counts="1"
    local time_out="1"

    echo "$(ping -q -c "$counts" -W "$time_out" "$address")"
}

parallel_ping()
{
    local addresses="$1"

    export -f ping_it
    parallel ping_it :::: "$addresses"
}

main()
{
    if [ "$ARGC" -gt 0 ]
    then
        for file in $ARGV; 
        do
            [[ -f "$file" ]] && parallel_ping "$file"
        done
    else
        usage
    fi
}

main