ubuntu unable to get online, one of the solutions

Each person's situation may be different, my situation is due to the forced shutdown a bad card, the network does not automatically assign ip, ens33 no ip network card, then have to manually start command sudo dhclientto get ip address automatically. Would like to thank this blog, I realized that their computer problems arise Ubuntu16.04 character interface ifconfig command Workaround None of the network interface ens33
As each card has a general management with hosted, because dhclient command should be trustee start, rather than manually. So you need to configure their own set of network management tools with specific reference to reboot the virtual machine is not running dhclient process solutions