#!/bin/bash
sum=`ifconfig eth0|awk '{print $5;exit 0;}'|md5sum`
for IP ; do
    echo $sum | awk -v IP=$IP '
BEGIN{
    split(IP,ipa,".");
}
{
    printf "ifconfig umn %-16s hw ether  %c2:%s:%s:%x:%x:%x  up\n",
           IP,substr($1,1,1),substr($1,2,2),substr($1,4,2),
           ipa[2],ipa[3],ipa[4];
}
'
done