Can't boot 14.04

[Jim]

On 11/07/2016 03:18 PM, Ralf Mardorf wrote:
> On Mon, 7 Nov 2016 14:45:24 -0600, Jim wrote:
>> On 11/07/2016 09:15 AM, Ralf Mardorf wrote:
>>> sudo apt-get purge $(dpkg -l nvidia* | grep ii | cut -d" " -f3)
>>>
>> Says no packages found matching <each of the files shown by ls> To
>> clear it says it can't find any of the nvidia files shown by ls.
>
> Then no package is installed. The above command should remove
> packages, assuming that packages should be installed. If no package
> is installed, it can't remove a package, this is ok. We only want to
> ensure that there really is no package installed.
>
>>> sudo apt-get update
>> The last few lines say: Failed to fetch
>> http://extras.ubuntu.com/ubuntu/dist/trusty/Release.  the error is
>> NO_PUBKEY
>
> In the future quote the original output. Most likely a hex number is
> shown or several hex numbers are shown.
>
> Run
>
> sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com
> 123456789ABCDE 23456789ABCDEF ...

OK, ran that, then ran sudo apt-get update and it finished with no errors.

>
> but replace "123456789ABCDE 23456789ABCDEF ..." with the shown
> number or numbers.
>
> You should google such things yourself.
>

I would have googled it if I had been interested in fixing the key 
problem at this time.  I didn't think it was relevant to what we were 
working on.

> It's strange that a key is missing.

I agree but it is fixed now.

Regards,  Jim