Resolves an issue where the network is not available after Ubuntu Server 12.04 has swapped the NIC MAC address.

Re-installed the system, a new Ubuntu virtual machine, loading the original image, the results of the network becomes abnormal after startup, prompting information

Waiting for network configuration ...
Waiting to + seconds for network configuration ...

Once the system has logged in, the execution ifconfig found only one lo, less eth0

Find the information on the Internet, find the solution, the method is very simple.

[Email protected]:~$ sudo rm/etc/udev/rules.d/70-persistent-net.rules

or sudo mv/etc/udev/rules.d/70-persistent-net.rules/etc/udev/rules.d/70-persistent-net.rules.bak

[Email protected]:~$ sudo reboot

After the restart is complete, the network is back to normal.

Resolves an issue where the network is not available after Ubuntu Server 12.04 has swapped the NIC MAC address.