I generated random numbers into a file 0.00 to 9.99

while true ; do echo `echo $RANDOM | cut -c 1`"."`echo $RANDOM | cut -c 1-2`  ; done > random


#!/bin/bash


for SLEEP in `cat /root/random`
  do
    sleep 10
    echo "ifdown eth0 ; sleep $SLEEP ; ifup eth0"
    echo `date`
    ifdown eth0 ; sleep $SLEEP ; ifup eth0 ; sleep $SLEEP
done