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I run a number of virtual servers on my network and I want to be able to easily clone base installations of Ubuntu Server. I use the VBoxManage command to clone the actual hard disk and I then create a new profile for my VM and copy over the settings of the original VM.

However, when I boot into the cloned VM, there seems to be a network problem. When I issue a PING I get the message "Network unreachable". I traced it down to the fact that the virtual network card of the cloned VM has a different MAC address then the original VM. When I copy the MAC address the clone seems to work fine.

How can I have the cloned VM have it's own MAC address?

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up vote 17 down vote accepted

Just remove /etc/udev/rules.d/70-persistent-net.rules then restart. And all will be fine.

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Correct and spot on, +1 – pauska Jun 24 '09 at 10:50
I'll mention that if you're importing via VBoxManage you may also have to reset the mac address using VBoxManage modifyvm MyVM --macaddress1 auto – matschaffer May 13 '11 at 3:29
The file comes up again on reboot. I am on Ubuntu 12.04. – Manish Aug 15 '12 at 18:59

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