#!/bin/bash
hostip=`hostname -i`
if [ $# -ge 1 ]; then
  hostfile=$1
else
  hostfile=hosts.txt
fi
parallel-ssh -h $hostfile "sed -E 's/gateway [[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+/gateway $hostip/g' /etc/network/interfaces > /etc/network/tmpif"
parallel-ssh -h $hostfile "chmod g-r,o-r /etc/network/tmpif"
parallel-ssh -h $hostfile "cp /etc/network/interfaces /etc/network/interfaces.bak"
parallel-ssh -h $hostfile "mv /etc/network/tmpif /etc/network/interfaces"
parallel-ssh -h $hostfile "ip route flush cache && /etc/init.d/networking restart"
//shell/8211