Erro GPG ao usar apt-get update [Resolvido]

[Homem_da_selva]

Boa tarde!...

Eu inseri alguns repositórios extras no meu "souceslist" entre eles o "medibuntu" e ao rodar o comando "apt-get upadate", após todo o processo surgio a seguinte mensagem de erro.

W: Erro GPG: http://packages.medibuntu.org precise InRelease: As assinaturas a seguir não puderam ser verificadas devido à chave pública não estar disponível: NO_PUBKEY 2EBC26B60C5A2783
W: Erro GPG: http://ppa.launchpad.net precise Release: As assinaturas a seguir não puderam ser verificadas devido à chave pública não estar disponível: NO_PUBKEY 43BB102C405A15CB

Segue meu "souceslist" para melhor entendimento:

# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ dists/oneiric/main/binary-i386/

# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ dists/precise/main/binary-i386/
# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ dists/precise/restricted/binary-i386/
# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ oneiric main restricted
# deb cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release amd64 (20120425)]/ precise main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://br.archive.ubuntu.com/ubuntu/ precise main restricted
deb-src http://br.archive.ubuntu.com/ubuntu/ precise main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://br.archive.ubuntu.com/ubuntu/ precise-updates main restricted
deb-src http://br.archive.ubuntu.com/ubuntu/ precise-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.
deb http://br.archive.ubuntu.com/ubuntu/ precise universe
deb-src http://br.archive.ubuntu.com/ubuntu/ precise universe
deb http://br.archive.ubuntu.com/ubuntu/ precise-updates universe
deb-src http://br.archive.ubuntu.com/ubuntu/ precise-updates universe

## 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://br.archive.ubuntu.com/ubuntu/ precise multiverse
deb-src http://br.archive.ubuntu.com/ubuntu/ precise multiverse
deb http://br.archive.ubuntu.com/ubuntu/ precise-updates multiverse
deb-src http://br.archive.ubuntu.com/ubuntu/ precise-updates multiverse

## 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://br.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
deb-src http://br.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu precise-security main restricted
deb-src http://security.ubuntu.com/ubuntu precise-security main restricted
deb http://security.ubuntu.com/ubuntu precise-security universe
deb-src http://security.ubuntu.com/ubuntu precise-security universe
deb http://security.ubuntu.com/ubuntu precise-security multiverse
deb-src http://security.ubuntu.com/ubuntu precise-security 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 precise partner
deb-src http://archive.canonical.com/ubuntu precise partner

## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu precise main
deb-src http://extras.ubuntu.com/ubuntu precise main
deb http://archive.canonical.com/ precise partner
deb-src http://archive.canonical.com/ precise partner

##############################################################
##################### UNOFFICIAL  REPOS ######################
##############################################################

###### 3rd Party Binary Repos

#### Mozilla Daily Build Team - http://edge.launchpad.net/~ubuntu-mozilla-daily/+archive/ppa
## Run this command: sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys  247510BE
deb http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu precise main


####### 3rd Party Source Repos

#### Mozilla Daily Build Team (Source) - http://edge.launchpad.net/~ubuntu-mozilla-daily/+archive/ppa
## Run this command: sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys  247510BE
deb-src http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu precise main

[platao]

http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu/pool/main/l/launchpad-getkeys/launchpad-getkeys_0.3.2-1~webupd8~oneiric_all.deb

instale o deb e depois;

sudo launchpad-getkeys ; sudo apt-get update

[Homem_da_selva]

Boa noite!...

Obrigado platão. Tudo resulvido.