Re: eth0 "disabled" after upgrade Squeeze to Wheezy

[Lisi Reisz <lisi.reisz@gmail.com>]

On Friday 15 November 2013 16:13:23 Lisi Reisz wrote:
> On Friday 15 November 2013 15:55:59 Lisi Reisz wrote:
> > Thanks, Tom. :-)
> >
> > On Friday 15 November 2013 15:29:00 Tom H wrote:
> > > On Fri, Nov 15, 2013 at 3:06 PM, Lisi Reisz
> > > <lisi.reisz@gmail.com>
> >
> > wrote:
> > > > I have just upgraded a client's computer to Wheezy.  It
> > > > appeared to go well and there was certainly an internet
> > > > connection: it would not have been able to upgrade otherwise!
> > > >
> > > > Now there is  none.  I have checked /etc/network/interfaces
> > > > and changed "allow-hotplug" to "auto", just for something to
> > > > try.
> > > >
> > > > :-( It made no difference.  I pinged the gateway, largely so
> > > >
> > > > that I could report that I had done so.  I got the error
> > > > message "Network is unreachable".
> > > >
> > > > KControl tells me that eth0 is "disabled".  How and why is it
> > > > disabled?  More importantly, **how do I enable it?**
> > >
> > > Has eth0 been renamed? What's the output of "ip a"?
> >
> > # ifup -a
> > ifup: failed to open statefile /run/network/ifstate: No such file
> > or directory
> >
> > I misread at first - but "ifup a" produces the same result.
> >
> > > (Did you run "ifup -a" or "ifup eth0" after changing
> > > "allow-hotplug" to "auto"?)
> >
> > Yes - and have restarted several times now. :-(
> >
> > "ifconfig -a" shows eth0 and lo, neither of which has an IP.
>
> # mkdir /run/network
> # ifup lo
>
> lo now has an IP address.
> eth0 is still "unknown interface"  :-(

After a reboot, the directory /run/network has disappeared and lo no 
longer has an IP. :-(