Unautheticatable updates

[Luis Paulo]

On Sat, Aug 21, 2010 at 6:28 AM, Chris Jeffries <chris at candm.org.uk> wrote:
> Hey guys,
>
> I just ran update manager as a result of some critical updates including
> some linux header updates as below
>
> adobeair (version 2.0.3.13070) will be upgraded to version 2.0.3.13070-0
> chromium-browser (version 5.0.375.99~r51029-0ubuntu0.10.04.1) will be
> upgraded to version 5.0.375.125~r53311-0ubuntu0.10.04.1
> chromium-browser-inspector (version 5.0.375.99~r51029-0ubuntu0.10.04.1)
> will be upgraded to version 5.0.375.125~r53311-0ubuntu0.10.04.1
> linux-headers-2.6.32-24 (version 2.6.32-24.39) will be upgraded to
> version 2.6.32-24.41
> linux-headers-2.6.32-24-generic (version 2.6.32-24.39) will be upgraded
> to version 2.6.32-24.41
> linux-image-2.6.32-24-generic (version 2.6.32-24.39) will be upgraded to
> version 2.6.32-24.41
> linux-libc-dev (version 2.6.32-24.39) will be upgraded to version
> 2.6.32-24.41
>
> Update manager says they cannot be authenticated.
>
> I do not understand the authentication process, so I am not sure where
> to start trying to track this down.
>
> I have just started working through a VPN tunnel that drops me in UK
> rather then natively connecting in China. I suspect it may be to do with
> repositories - but before I start fiddling around, has anyone any
> experience with the authentication of packages please.
>
>
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Please try
$ sudo apt-get update
$ sudo apt-get upgrade

And see if that gives more info on the problem. It doesn't seem authentication.
(about the VPN, that's another matter)

Luis
PS: if you do wish to read about apt authentication, you may see
https://help.ubuntu.com/community/SecureApt
https://help.ubuntu.com/community/Repositories/Ubuntu#Authentication%20Tab

and the man pages for apt-get, apt-secure, apt-key and sources.list