#!/bin/bash
USERNAME=lxadmin
HOSTS=(127.0.0.1 192.168.184.129)
SCRIPT="awk -F : '{print \$1, \$3}' /etc/passwd"
printf "%-30s%-30s%-30s\n" Username: Host1: Host2:
echo "-----------------------------------------"
for HOSTNAME in ${HOSTS[*]} ; do
    server=( $( ssh -l ${USERNAME} ${HOSTNAME} "${SCRIPT}"))
                       printf  "%-30s%-30s%-30s\n"  ${server[*]}
               done