Pessoal estou com um probleminha aki, quando digito sudo apt-get update no terminal atinge até um certo ponto e aparece a seguinte mensagem:

W: Falhou ao buscar http://archive.canonical.com/dists/lucid/Release Unable to find expected entry parther/binary-i386/Packages in Meta-index file (malformed Release file?)

E: Alguns arquivos de índice falharam para baixar, eles foram ignorados ou os antigos foram usados no lugar.

Essa mesma mensagem aparece quando eu entro no gerenciador de atualizações e clico em verificar.

Desde já, agradeço.

Apague as 4 últimas linhas do arquivo e salve.

Poste aqui o arquivo /etc/apt/sources.list

Poste aqui o arquivo /etc/apt/sources.list(2)

esta aqui o arquivo:

# deb cdrom:[Ubuntu 10.04 LTS _Lucid Lynx_ - Release i386 (20100429)]/ lucid main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.

deb http://archive.ubuntu.com/ubuntu lucid main restricted
deb-src http://archive.ubuntu.com/ubuntu lucid main restricted

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

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

amigo deu certíssimo após apagar as linhas que vc falou, muito obrigado pela ajuda.