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I have a Virtualbox instance running the latest Ubuntu hosted on OSX. Things worked fine until today when, for no apparent reason, Ubuntu stopped raising the network card on startup.
I've fiddled with all network options in VirtualBox but nothing seems to work.
How can I troubleshoot this?
Added as suggested:
I can see eth0, but it has no IP is assigned. Could the problem be with the router, to which I do not have access?
Host is fine. The problem is that when ubuntu boots up fails to start the network cards. I can see eth0, but it has no IP assigned. – ruipacheco – 2013-04-09T15:24:09.370
This would be useful to add to your question, along with anything else you've learned about the issue that might help someone help you. – JRobert – 2013-04-09T15:34:04.563