Adicionar e remover aplicações [RESOLVIDO]

Olá pessoal, estou tentando instalar o kppp através da opção na parte grafica de "adicionar e remover aplicações" mas nem o kppp nem qualquer outra aplicação eu consigo instalar, até quando dou um sudo apt-get update pelo console tb falha, estou usando o ubuntu 8.10 (quando estava com o 8.4 não tive problemas). Se alguem puder ajudar agradeço.

Verifica se o sources.list está tudo em ordem ou seja se os repositorios estão todos cofigurador certinho

# deb cdrom:[Ubuntu 8.04 _Hardy Heron_ - Release i386 (20080423)]/ hardy 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/ hardy main restricted
deb-src http://br.archive.ubuntu.com/ubuntu/ hardy main restricted

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

## 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
## universe WILL NOT receive any review or updates from the Ubuntu security
## team.
deb http://br.archive.ubuntu.com/ubuntu/ hardy universe
deb-src http://br.archive.ubuntu.com/ubuntu/ hardy universe
deb http://br.archive.ubuntu.com/ubuntu/ hardy-updates universe
deb-src http://br.archive.ubuntu.com/ubuntu/ hardy-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/ hardy multiverse
deb-src http://br.archive.ubuntu.com/ubuntu/ hardy multiverse
deb http://br.archive.ubuntu.com/ubuntu/ hardy-updates multiverse
deb-src http://br.archive.ubuntu.com/ubuntu/ hardy-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://br.archive.ubuntu.com/ubuntu/ hardy-backports main restricted universe multiverse
# deb-src http://br.archive.ubuntu.com/ubuntu/ hardy-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 hardy partner
# deb-src http://archive.canonical.com/ubuntu hardy partner

deb http://security.ubuntu.com/ubuntu hardy-security main restricted
deb-src http://security.ubuntu.com/ubuntu hardy-security main restricted
deb http://security.ubuntu.com/ubuntu hardy-security universe
deb-src http://security.ubuntu.com/ubuntu hardy-security universe
deb http://security.ubuntu.com/ubuntu hardy-security multiverse
deb-src http://security.ubuntu.com/ubuntu hardy-security multiverse

Ontém mesmo voltei para o ubuntu 8.4 mas o problema persiste...

Entao seu problema esta na internet, voce navega na net, consegue fazer um ping?

Sim a net aqui está ok, mas ao dar um sudo apt-get update dá erro, e agora pra completar a opção adicionar e remover aplicações sumiu...rs

Da uma olhada no apt voce esta usando o Ubunut 8.10 olha se esta linha esta comentada!! ELA DEVE ESTA COMENTDA..

#deb cdrom:[Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081029.5)]/ intrepid main restricted
-------------------------------------------------------------------------

Se estiver.. ai esta o meu apt... tenta compiar e colocar.. e da update

deb http://br.archive.ubuntu.com/ubuntu/ intrepid main restricted
deb-src http://br.archive.ubuntu.com/ubuntu/ intrepid main restricted
deb http://br.archive.ubuntu.com/ubuntu/ intrepid-updates main restricted
deb-src http://br.archive.ubuntu.com/ubuntu/ intrepid-updates main restricted
deb http://br.archive.ubuntu.com/ubuntu/ intrepid universe
deb-src http://br.archive.ubuntu.com/ubuntu/ intrepid universe
deb http://br.archive.ubuntu.com/ubuntu/ intrepid-updates universe
deb-src http://br.archive.ubuntu.com/ubuntu/ intrepid-updates universe
deb http://br.archive.ubuntu.com/ubuntu/ intrepid multiverse
deb-src http://br.archive.ubuntu.com/ubuntu/ intrepid multiverse
deb http://br.archive.ubuntu.com/ubuntu/ intrepid-updates multiverse
deb-src http://br.archive.ubuntu.com/ubuntu/ intrepid-updates multiverse
deb http://security.ubuntu.com/ubuntu intrepid-security main restricted
deb-src http://security.ubuntu.com/ubuntu intrepid-security main restricted
deb http://security.ubuntu.com/ubuntu intrepid-security universe
deb-src http://security.ubuntu.com/ubuntu intrepid-security universe
deb http://security.ubuntu.com/ubuntu intrepid-security multiverse
deb-src http://security.ubuntu.com/ubuntu intrepid-security multiverse

A sua net você precisa terminar servidor proxy no navegador ?
tipo se precisar precisa configurar isso também no apt-get, mas caso contrario pode ser problemas nos repositos, tipo tenta fazer uma pesquina na net, pra ver se esses repositorios estão todos ok.
Abraço.

eu não estou usando proxy no momento

qual erro está aparecendo?

Olá pessoal, resolvido, eu mudei para a versao 8.4 e fui tentando até que consegui... não foi necessário nenhuma configuração, nesse caso acredito que seja a conexão daqui de onde eu trabalho que teve momentos que estavamos utilizando proxy (e eu não sabia).

Obrigada a todos