So here’s how we fix it:

1. Remove the kernel’s networking interface rules file so that it can be regenerated

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

2. Restart the VM

   # reboot

3. UPDATE your interface configuration file

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

   Remove the MACADDR entry or update it to the new MACADDR for the interface (listed in this file: /etc/udev/rules.d/70-persistent-net.rules).

   Remove the UUID entry

   Save and exit the file

4. Restart the networking service

   # service network restart

Happy cloning!

二.另一種方法

造成這樣的原因，是因為在虛擬機（Vmware）中移動了Centos系統對應的文件，導致重新配置時，網卡的MAC地址變了，輸入ifconfig -a,找不到eth0

·······

安裝完一個centos虛擬機，又拷貝一份，開機後網卡無法正常啟動，報錯：Device eth0 does not seem to be present,
delaying initialization

修改IP地址，刪除mac地址（HWADDR），刪除UUID項。
然後重啟啟動網卡嘗試下

關於virulbox克隆了centos6.0最小化安裝後如何使網卡能夠上網