Error:Server and "device eth0 does not seem to be present, delaying initialization" Error

Solutions:

#less /etc/udev/rules.d/70-persistent-net.rules

#rm -f /etc/udev/rules.d/70-persistent-net.rules

Reboot your machine as after reboot a new file will be created with the details of your new NIC card

#init 6
#less /etc/udev/rules.d/70-persistent-net.rules
As you can see the difference in MAC id and NIC card name
It is time for you to copy the new MAC id and NIC card name to your ifcfg-eth0 file

# vi /etc/sysconfig/network-scripts/ifcfg-eth0

Change MAC Address