Erro ao atualizar

Boa noite amigos. Estava instalando o redmine por apt-get, e segui alguns comando no forum oficial do Redmine. E lá pedia para dar o seguinte comando: export http_proxy="http://proxy.your.server:port"; and export https_proxy="http:proxy.your.server:port". E foi isso que eu fiz. Porém, apos dar esse comando não quer mais atualizar nem instalar nada. Quando tento dar um apt-get updade demora um tempão e aparece a seguinte mensagem: Err http://br.archive.ubuntu.com oneiric-updates/universe Translation-en
Algo estranho aconteceu 'proxy.your.server:http' resolvendo (-5 - Não há endereço associado com o nome)

Alguem poderia me ajudar a voltar a configuração inicial. Desde já agradeço a ajuda.

root@ubuntu:/etc/apt/apt.conf.d# apt-get update
Ign http://security.ubuntu.com oneiric-security InRelease
Ign http://security.ubuntu.com oneiric-security Release.gpg
Ign http://br.archive.ubuntu.com oneiric InRelease
Ign http://br.archive.ubuntu.com oneiric-updates InRelease
Ign http://security.ubuntu.com oneiric-security Release
Ign http://br.archive.ubuntu.com oneiric-backports InRelease
Ign http://security.ubuntu.com oneiric-security/main Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric Release.gpg
Ign http://br.archive.ubuntu.com oneiric-updates Release.gpg
Ign http://security.ubuntu.com oneiric-security/restricted Sources/DiffIndex
Ign http://security.ubuntu.com oneiric-security/universe Sources/DiffIndex
Ign http://security.ubuntu.com oneiric-security/multiverse Sources/DiffIndex
Ign http://security.ubuntu.com oneiric-security/main i386 Packages/DiffIndex
Ign http://security.ubuntu.com oneiric-security/restricted i386 Packages/DiffIndex
Ign http://security.ubuntu.com oneiric-security/universe i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-backports Release.gpg
Ign http://br.archive.ubuntu.com oneiric Release
Ign http://security.ubuntu.com oneiric-security/multiverse i386 Packages/DiffIndex
Ign http://security.ubuntu.com oneiric-security/main TranslationIndex
Ign http://security.ubuntu.com oneiric-security/multiverse TranslationIndex
Ign http://security.ubuntu.com oneiric-security/restricted TranslationIndex
Ign http://security.ubuntu.com oneiric-security/universe TranslationIndex
Ign http://br.archive.ubuntu.com oneiric-updates Release
Ign http://br.archive.ubuntu.com oneiric-backports Release
Ign http://br.archive.ubuntu.com oneiric/main Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric/restricted Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric/universe Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric/multiverse Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric/main i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric/restricted i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric/universe i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric/multiverse i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric/main TranslationIndex
Ign http://br.archive.ubuntu.com oneiric/multiverse TranslationIndex
Ign http://br.archive.ubuntu.com oneiric/restricted TranslationIndex
Ign http://br.archive.ubuntu.com oneiric/universe TranslationIndex
Ign http://br.archive.ubuntu.com oneiric-updates/main Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-updates/restricted Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-updates/universe Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-updates/multiverse Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-updates/main i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-updates/restricted i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-updates/universe i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-updates/multiverse i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-updates/main TranslationIndex
Ign http://br.archive.ubuntu.com oneiric-updates/multiverse TranslationIndex
Ign http://br.archive.ubuntu.com oneiric-updates/restricted TranslationIndex
Ign http://br.archive.ubuntu.com oneiric-updates/universe TranslationIndex
Ign http://br.archive.ubuntu.com oneiric-backports/main Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-backports/restricted Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-backports/universe Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-backports/multiverse Sources/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-backports/main i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-backports/restricted i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-backports/universe i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-backports/multiverse i386 Packages/DiffIndex
Ign http://br.archive.ubuntu.com oneiric-backports/main TranslationIndex
Ign http://br.archive.ubuntu.com oneiric-backports/multiverse TranslationIndex
Ign http://br.archive.ubuntu.com oneiric-backports/restricted TranslationIndex
Ign http://br.archive.ubuntu.com oneiric-backports/universe TranslationIndex
Err http://security.ubuntu.com oneiric-security/main Sources
404 Not Found
Err http://security.ubuntu.com oneiric-security/restricted Sources
404 Not Found
Err http://security.ubuntu.com oneiric-security/universe Sources
404 Not Found
Err http://security.ubuntu.com oneiric-security/multiverse Sources
404 Not Found
Err http://security.ubuntu.com oneiric-security/main i386 Packages
404 Not Found
Err http://security.ubuntu.com oneiric-security/restricted i386 Packages
404 Not Found
Err http://security.ubuntu.com oneiric-security/universe i386 Packages
404 Not Found
Err http://security.ubuntu.com oneiric-security/multiverse i386 Packages
404 Not Found
Ign http://security.ubuntu.com oneiric-security/main Translation-pt_BR
Ign http://security.ubuntu.com oneiric-security/main Translation-pt
Ign http://security.ubuntu.com oneiric-security/main Translation-en
Ign http://security.ubuntu.com oneiric-security/multiverse Translation-pt_BR
Ign http://security.ubuntu.com oneiric-security/multiverse Translation-pt
Ign http://security.ubuntu.com oneiric-security/multiverse Translation-en
Ign http://security.ubuntu.com oneiric-security/restricted Translation-pt_BR
Ign http://security.ubuntu.com oneiric-security/restricted Translation-pt
Ign http://security.ubuntu.com oneiric-security/restricted Translation-en
Ign http://security.ubuntu.com oneiric-security/universe Translation-pt_BR
Ign http://security.ubuntu.com oneiric-security/universe Translation-pt
Ign http://security.ubuntu.com oneiric-security/universe Translation-en
Err http://br.archive.ubuntu.com oneiric/main Sources
404 Not Found
Err http://br.archive.ubuntu.com oneiric/restricted Sources
404 Not Found
Err http://br.archive.ubuntu.com oneiric/universe Sources
404 Not Found
Err http://br.archive.ubuntu.com oneiric/multiverse Sources
404 Not Found
Err http://br.archive.ubuntu.com oneiric/main i386 Packages
404 Not Found
Err http://br.archive.ubuntu.com oneiric/restricted i386 Packages
404 Not Found
Err http://br.archive.ubuntu.com oneiric/universe i386 Packages
404 Not Found
Err http://br.archive.ubuntu.com oneiric/multiverse i386 Packages
404 Not Found
Ign http://br.archive.ubuntu.com oneiric/main Translation-pt_BR
Ign http://br.archive.ubuntu.com oneiric/main Translation-pt
Ign http://br.archive.ubuntu.com oneiric/main Translation-en
Ign http://br.archive.ubuntu.com oneiric/multiverse Translation-pt_BR
Ign http://br.archive.ubuntu.com oneiric/multiverse Translation-pt
Ign http://br.archive.ubuntu.com oneiric/multiverse Translation-en
Ign http://br.archive.ubuntu.com oneiric/restricted Translation-pt_BR
Ign http://br.archive.ubuntu.com oneiric/restricted Translation-pt
Ign http://br.archive.ubuntu.com oneiric/restricted Translation-en
Ign http://br.archive.ubuntu.com oneiric/universe Translation-pt_BR
Ign http://br.archive.ubuntu.com oneiric/universe Translation-pt
Ign http://br.archive.ubuntu.com oneiric/universe Translation-en
Err http://br.archive.ubuntu.com oneiric-updates/main Sources
404 Not Found
Err http://br.archive.ubuntu.com oneiric-updates/restricted Sources
404 Not Found
Err http://br.archive.ubuntu.com oneiric-updates/universe Sources
404 Not Found
Err http://br.archive.ubuntu.com oneiric-updates/multiverse Sources
404 Not Found
Err http://br.archive.ubuntu.com oneiric-updates/main i386 Packages
404 Not Found
Err http://br.archive.ubuntu.com oneiric-updates/restricted i386 Packages
404 Not Found
Err http://br.archive.ubuntu.com oneiric-updates/universe i386 Packages
404 Not Found
Err http://br.archive.ubuntu.com oneiric-updates/multiverse i386 Packages
404 Not Found
Ign http://br.archive.ubuntu.com oneiric-updates/main Translation-pt_BR
Ign http://br.archive.ubuntu.com oneiric-updates/main Translation-pt
Ign http://br.archive.ubuntu.com oneiric-updates/main Translation-en
Ign http://br.archive.ubuntu.com oneiric-updates/multiverse Translation-pt_BR
Ign http://br.archive.ubuntu.com oneiric-updates/multiverse Translation-pt
Ign http://br.archive.ubuntu.com oneiric-updates/multiverse Translation-en
Ign http://br.archive.ubuntu.com oneiric-updates/restricted Translation-pt_BR
Ign http://br.archive.ubuntu.com oneiric-updates/restricted Translation-pt
Ign http://br.archive.ubuntu.com oneiric-updates/restricted Translation-en
Ign http://br.archive.ubuntu.com oneiric-updates/universe Translation-pt_BR
Ign http://br.archive.ubuntu.com oneiric-updates/universe Translation-pt
Ign http://br.archive.ubuntu.com oneiric-updates/universe Translation-en
Err http://br.archive.ubuntu.com oneiric-backports/main Sources
404 Not Found
Err http://br.archive.ubuntu.com oneiric-backports/restricted Sources
404 Not Found
Err http://br.archive.ubuntu.com oneiric-backports/universe Sources
404 Not Found
Err http://br.archive.ubuntu.com oneiric-backports/multiverse Sources
404 Not Found
Err http://br.archive.ubuntu.com oneiric-backports/main i386 Packages
404 Not Found
Err http://br.archive.ubuntu.com oneiric-backports/restricted i386 Packages
404 Not Found
Err http://br.archive.ubuntu.com oneiric-backports/universe i386 Packages
404 Not Found
Err http://br.archive.ubuntu.com oneiric-backports/multiverse i386 Packages
404 Not Found
Ign http://br.archive.ubuntu.com oneiric-backports/main Translation-pt_BR
Ign http://br.archive.ubuntu.com oneiric-backports/main Translation-pt
Ign http://br.archive.ubuntu.com oneiric-backports/main Translation-en
Ign http://br.archive.ubuntu.com oneiric-backports/multiverse Translation-pt_BR
Ign http://br.archive.ubuntu.com oneiric-backports/multiverse Translation-pt
Ign http://br.archive.ubuntu.com oneiric-backports/multiverse Translation-en
Ign http://br.archive.ubuntu.com oneiric-backports/restricted Translation-pt_BR
Ign http://br.archive.ubuntu.com oneiric-backports/restricted Translation-pt
Ign http://br.archive.ubuntu.com oneiric-backports/restricted Translation-en
Ign http://br.archive.ubuntu.com oneiric-backports/universe Translation-pt_BR
Ign http://br.archive.ubuntu.com oneiric-backports/universe Translation-pt
Ign http://br.archive.ubuntu.com oneiric-backports/universe Translation-en
W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/oneiric-security/main/source/Sources 404 Not Found

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/oneiric-security/restricted/source/Sources 404 Not Found

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/oneiric-security/universe/source/Sources 404 Not Found

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/oneiric-security/multiverse/source/Sources 404 Not Found

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/oneiric-security/main/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/oneiric-security/restricted/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/oneiric-security/universe/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://security.ubuntu.com/ubuntu/dists/oneiric-security/multiverse/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric/main/source/Sources 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric/restricted/source/Sources 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric/universe/source/Sources 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric/multiverse/source/Sources 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric/main/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric/restricted/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric/universe/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric/multiverse/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-updates/main/source/Sources 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-updates/restricted/source/Sources 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-updates/universe/source/Sources 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-updates/multiverse/source/Sources 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-updates/main/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-updates/restricted/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-updates/universe/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-updates/multiverse/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-backports/main/source/Sources 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-backports/restricted/source/Sources 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-backports/universe/source/Sources 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-backports/multiverse/source/Sources 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-backports/main/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-backports/restricted/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-backports/universe/binary-i386/Packages 404 Not Found

W: Falhou ao buscar http://br.archive.ubuntu.com/ubuntu/dists/oneiric-backports/multiverse/binary-i386/Packages 404 Not Found

E: Alguns arquivos index falharam ao ser baixados. Eles foram ignorados, ou cópias antigas são usadas ao invés.

# deb cdrom:[Ubuntu 11.10 _Oneiric Ocelot_ - Release i386 (20111012)]/ oneiric 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/ oneiric main restricted
deb-src http://br.archive.ubuntu.com/ubuntu/ oneiric main restricted

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

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

## Uncomment the following two lines to add software from Ubuntu's
## 'extras' repository.
## 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 oneiric main
# deb-src http://extras.ubuntu.com/ubuntu oneiric main