Requires installation of untrusted packages

[RoRoRed]

Hey out there in the void of the ether,

I want to install application using the ubuntu software centre;
but all i get is this error message:

Requires installation of untrusted packages
"The action would require the installation of packages from not authenticated sources."

can anyone explain in simple words (and commands) how to solve the issue?

thanks!

[Excedio]

Seems that you are not the only one with this problem.

https://bugs.launchpad.net/ubuntu/+s...er/+bug/475075

[bodhi.zazen]

https://help.ubuntu.com/community/SecureApt

Basically, packages are signed with a GPG key and most likely that message is because you need to import a key.

We need more information, including the exact error message and the contents of /etc/apt/sources.list

[RoRoRed]

Now it works,

well I checked the box for source code (in the ubuntu register)

thanks for your help & sorry to have wasted your time ^_^

[stormsurge]

I have the same problem... Can you make the solution simple? Sorry guys... Thanks!

[bodhi.zazen]

I have the same problem... Can you make the solution simple? Sorry guys... Thanks!

See the link I gave you. It works for the default repositories.

If you need more specific assistance you need to provide us with more details. What repository are you trying to add ? what error message are you getting ?

[-=hazard=-]

Same error here. Installing from Synaptic. Same error from Software Center. Repository Universe. I made some screens.

[NoaHall]

Same error here. Installing from Synaptic. Same error from Software Center. Repository Universe. I made some screens.

Can you post the output of

cat /etc/apt/sources.list

and then

gpg --list-keys

from the terminal?

[-=hazard=-]

# deb cdrom:[Ubuntu 9.10 _Karmic Koala_ - Release i386 (20091028.5)]/ karmic main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.

deb http://ubuntu.ynet.sk/ubuntu/ karmic main restricted universe
deb-src http://ubuntu.ynet.sk/ubuntu/ karmic main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://ubuntu.ynet.sk/ubuntu/ karmic-updates main restricted universe
deb-src http://ubuntu.ynet.sk/ubuntu/ karmic-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://ubuntu.ynet.sk/ubuntu/ karmic multiverse
deb-src http://ubuntu.ynet.sk/ubuntu/ karmic multiverse
deb http://ubuntu.ynet.sk/ubuntu/ karmic-updates multiverse
deb-src http://ubuntu.ynet.sk/ubuntu/ karmic-updates multiverse

## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb http://pl.archive.ubuntu.com/ubuntu/ karmic-backports main restricted universe multiverse
# deb-src http://pl.archive.ubuntu.com/ubuntu/ karmic-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu karmic partner
deb-src http://archive.canonical.com/ubuntu karmic partner

deb http://ubuntu.ynet.sk/ubuntu/ karmic-security main restricted universe
deb-src http://ubuntu.ynet.sk/ubuntu/ karmic-security main restricted
deb http://ubuntu.ynet.sk/ubuntu/ karmic-security multiverse
deb-src http://ubuntu.ynet.sk/ubuntu/ karmic-security multiverse
deb http://packages.medibuntu.org/ karmic free non-free

I have only 1 key, that is not the VLC one. I have added only mediubuntu repository, the others are just default.

[-=hazard=-]

Ok, problem solved by changing the repository to the main one.