no network (eth0/wlan0) after reinstall of 15.10

Colin Law clanlaw at
Tue Jan 12 20:25:52 UTC 2016

On 12 January 2016 at 08:38, robert <robert at> wrote:
> Hi there,
> after reinstalling 15.10 (using the option in its install menu to reinstall
> preserving user data) I have no entries in /etc/network/interfaces but the
> local interface.
> how can I add the by hand? And have them work of course.
> It looks as if just adding the wlan0 interface to /etc/network/interfaces
> does not help.

Assuming you are using Ubuntu desktop rather than server then the
networks are handled by Network Manager.  What do you see in
/var/log/syslog relating to wlan?


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