Neste
site vc. pode gerar uma lista de repositórios (
sources.list) como a gerada abaixo, só com os
repositórios originais do Ubuntu.
# Automatically generated sources.list
# http://www.ubuntu-nl.org/source-o-matic/
#
# If you get GPG errors with this sources.list, locate the GPG key in this file
# and run these commands (where KEY is replaced with that key)
#
# gpg --keyserver hkp://subkeys.pgp.net --recv-keys KEY
# gpg --export --armor KEY | sudo apt-key add -
#
# If you don't know what to do with this file, read
# https://help.ubuntu.com/community/Repositories/CommandLine
# Ubuntu supported packages
# GPG key: 437D05B5
deb http://br.archive.ubuntu.com/ubuntu feisty main restricted
deb http://br.archive.ubuntu.com/ubuntu feisty-updates main restricted
deb http://security.ubuntu.com/ubuntu feisty-security main restricted
deb-src http://br.archive.ubuntu.com/ubuntu feisty main restricted
deb-src http://br.archive.ubuntu.com/ubuntu feisty-updates main restricted
deb-src http://security.ubuntu.com/ubuntu feisty-security main restricted
# Ubuntu community supported packages
# GPG key: 437D05B5
deb http://br.archive.ubuntu.com/ubuntu feisty universe multiverse
deb http://br.archive.ubuntu.com/ubuntu feisty-updates universe multiverse
deb http://security.ubuntu.com/ubuntu feisty-security universe multiverse
deb-src http://br.archive.ubuntu.com/ubuntu feisty universe multiverse
deb-src http://br.archive.ubuntu.com/ubuntu feisty-updates universe multiverse
deb-src http://security.ubuntu.com/ubuntu feisty-security universe multiverse
E para editar sua
sources.list é preciso usar o
sudo, como abaixo:
sudo gedit /etc/apt/sources.list
Copie e cole o conteúdo da
sources.list acima e salve, fazendo depois o
update com o comando:
sudo apt-get update
Se vc. sabia algo que eu disse aqui, saiba que procurei dar a resposta o mais completa possível e não menosprezar seu conhecimento.
Até outra e boa sorte.