Re: eth0 "disabled" after upgrade Squeeze to Wheezy
On Fri, Nov 15, 2013 at 5:53 PM, Lisi Reisz <lisi.reisz@gmail.com> wrote:
> On Friday 15 November 2013 17:06:55 Tom H wrote:
>> On Fri, Nov 15, 2013 at 4:13 PM, Lisi Reisz <lisi.reisz@gmail.com>
> wrote:
>>> On Friday 15 November 2013 15:55:59 Lisi Reisz wrote:
>>>> 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" :-(
>>
>> cat /etc/network/interfaces
>
> It was:
> -----------------------------------------------------------------
> # This file describes the network interfaces available on your system
> # and how to activate them. For more information, see interfaces(5).
>
> # The loopback network interface
> auto lo
> iface lo inet loopback
>
> # The primary network interface
> auto eth0
> iface eth0 inet dhcp
> -------------------------------------------------------
>
> It is now <%$&()&^$£%>:
> --------------------------------------------------------
> # This file describes the network interfaces available on your system
> # and how to activate them. For more information, see interfaces(5).
>
> # The loopback network interface
> auto lo
> iface lo inet loopback
>
> # The primary network interface
> --------------------------------------------------------
Are you comparing pre- and post-diest-upgrade?
Re-adding the two etho lines should fix it all for you - unless a
reboot deletes them, somehow!
If it happened via the dist-upgrade (and not via debconf), grepping
"/var/lib/dpkg/info/*" for "/etc/network/interfaces" might give you
the culprit; most likely the ifupdown scripts in there.
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