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My native linux partition is connected with a yagi usb antenna and my virtual machine is a cloned setup of it, the problem is the mac adress that interfere but i could only change the mac adress of the native partition because of the specifics uses of the virtual machine ...

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marked as duplicate by Eliah Kagan, guntbert, Eric Carvalho, karel, BuZZ-dEE Jan 20 '14 at 7:57

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Use macchanger.

This is the sample command:

macchanger --mac 00:11:22:33:44:55 wlan0
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This can be configured in Network Manager nowadays. Below is a screenshot in KDE (Kubuntu), but this should be very similar in regular Ubuntu (Unity).

enter image description here

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very simple click on your network icon in the task bar, click wlan0 , click on edit.. change the mac and save :)

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