Some recent changes to Ubuntu have changed the way we set a static IP in Ubuntu 12.04 and 12.10. Previously we could change the /etc/resolv.conf file adding in our static IP details. But due to some internal changes I’m finding it more stable to make changes in the graphical interface…. nm-connection-editor, as these new changes are overwriting the file with some generated content.
UPDATE: I have written some instructions on how to set a static IP in a more ‘Linux’ fashion. Check them out here (for wired connections only)