help me to install various packages in ubuntu 10.04

[Maurice McCarthy]

On 31 July 2010 07:40, ramya lakshmanan <lramya1989 at gmail.com> wrote:
> if i tried to install packages using software manager, always it giving
> error tat untursted packages nu. so i was not able to install any more
> packages. so please helpm me to resolve this problem
>
> --
> with regards
>
> RamyaShanmugam
>

Ubuntu packages come with a digital signature. When you have the key
which matches this signature then the package is trusted. So, it
sounds as though either some signatures or security keys are missing.
Do

Applications - Accessories - Terminal       and then type in
$ aptitude search keyring                        you should see a line
i   ubuntu-keyring                                   this means that
the bunch of keys
                                                           for ubuntu
is installed.

On my system I also have these installed
debian-archive-keyring
gnome-keyring

So you could try

$ sudo aptitude reinstall ubuntu-keyring                 and, if necessary
$ sudo aptitude install debian-archive-keyring gnome-keyring

Then try installing your packages again. If this fails we shall have
to look further. You could be trying to install packages from some
other software repository.

-- 
Best Wishes
Maurice.