===========/etc/init.d/renameif.sh======================================
#! /bin/sh
### BEGIN INIT INFO
# Provides:          renameif
# Required-Start:
# Required-Stop:
# Default-Start:     S38
# Default-Stop:
# Short-Description: Renames the eth* interfaces
# Description:       Renames the eth* interfaces
### END INIT INFO

PATH=/sbin:/bin

. /lib/init/vars.sh
. /lib/lsb/init-functions

VERBOSE=yes

renameif() {
        NEW_NAME=$(/bin/egrep "^$1 " /etc/network/ifnames | /bin/sed -r 's:[^ ]+(.*)$:\1:')
        [ "$VERBOSE" != no ] && log_action_begin_msg "Renaming $1 to '$NEW_NAME'"
        /sbin/ip link set dev $1 name $NEW_NAME
        ES=$?
        [ "$VERBOSE" != no ] && log_action_end_msg $ES
        return $ES
}

do_start () {
        /sbin/ifconfig -a | /bin/egrep -o 'eth[0-9]+' | /usr/bin/sort -u | while read if; do renameif $if; done
}

case "$1" in
  start|"")
        do_start
        ;;
  restart|reload|force-reload)
        echo "Error: argument '$1' not supported" >&2
        exit 3
        ;;
  stop)
        # No-op
        ;;
  *)
        echo "Usage: renameif.sh [start|stop]" >&2
        exit 3
        ;;
esac

=======================================================================================================


=======================/etc/network/ifnames============================================================
eth0 inside
eth1 outside
eth2 dmz
=========================================================================================