I got the problem on 14.04.3(default install iso, do not apply network update or upgeade to 14.04.6), the system sometimes network fail, can't ping other one and arp get the mac address show ,i need always manual type sudo ifconfig eth0 down ;sudo ifocnfig eth 0 up to restart the network function normal, so i looking for how to create the scrip when cat /proc/net/arp if show incomplete , when run sudo ifconfig eth0 down ;sudo ifocnfig eth 0 ? I will run this sh file by cronjob every minutes and I was set sudoers no need entey sudo password, thx

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