Can't boot 14.04

[Ralf Mardorf]

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 ...

but replace "123456789ABCDE 23456789ABCDEF ..." with the shown number
or numbers.

You should google such things yourself.

It's strange that a key is missing.

>>   sudo apt --no-install-recommends install nvidia-304*131*deb
>> nvidia-settings_331*deb  
>
>Says unable to locate  nvidia-304*131*deb
>Says can't find by regrex  nvidia-304*131*deb

You're still in /var/cache/apt/archives/?

Run

  sudo apt --no-install-recommends install /var/cache/apt/archives/nvidia-304*131*deb

and perhaps install the other package later, by either cd into the dir
or adding the path to the apt command.

Regards,
Ralf

PS:

The first hit of

https://www.google.de/?gws_rd=ssl#q=Failed+to+fetch++http:%2F%2Fextras.ubuntu.com%2Fubuntu%2Fdist%2Ftrusty%2FRelease+no+pub+key

is

http://askubuntu.com/questions/235880/how-to-fix-gpg-in-updater