Change eth1 back to eth0

Link: http://ubuntuforums.org/showthread.php?t=281120
Link: http://ubuntuforums.org/showthread.php?p=5117082

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Edit the file using the following comand and remove the existing eth0 line:

$ sudo gedit /etc/iftab

No ubuntu hardy o caminho é:
/etc/udev/rules.d/70-persistent-net.rules