[ubuntu-uk] 10.04 software center - cannot install untrusted packages

[Neil Greenwood]

On 2 June 2010 15:10, Markie <mark.curtis.1970 at googlemail.com> wrote:
> Hi Folks,
>
> Since I upgraded to 10.04 - 64bit I noticed i couldnt install from untrusted
> sources in the software centre, I can however on command line. The error
> message I see is
>
> "The action would require the installation of packages from unauthenticated
> sources." However in my "Software Sources" I have enabled all the "main",
> "universe" etc, do i need to add another repository?
>
> thanks
>
> Markie
>

Do you get error messages about missing keys when updating the list of
packages on the command line (i.e. using either 'sudo apt-get update'
or 'sudo aptitude update')?

This sometimes happens after adding new repositories, e.g. PPAs. The
ID of the missing key will be displayed, and you can get it (if you
trust the person who's in charge of the repository, of course!) using
the following command:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-key <ID>

where you replace <ID> with the ID of the key mentioned in the error
message. I believe (although I've never tried) that you can download
multiple keys in one go by adding one or more extra '--recv-key <ID>'
bits on the end of the command.

If that's not the problem, I've no idea.

HTH,
Neil.