Just did a re-installation, and indeed, the script runs nicely to the end.
Awesome! Thanks! Great to hear the feedback!
ps still have the issue when I want to change my internall IP. But I guess it has something to do with /etc/NetworkManager/NetworkManager.conf. When I comment the dns, make managed true, update /etc/network/interface, it works a lot better...
This makes me wonder a lot. Can you provide some more specifics about the issue? NetworkManager *should* be disabled. If it is still having an influence I'm not aware of it. Please let us know any and all specifics you can provide about this! Thanks!