Sempre que tento atualizar o ubuntu 16.04 pelo atualizador de software, recebo um erro dizendo "Falha ao baixar as informações do repositório. Verifique sua conexão com a Internet". Eu tentei várias coisas que encontrei on-line, mas nenhuma delas funciona.
Isso é o que eu recebi depois de digitar grep -E '^\w' /etc/apt/sources.list no terminal.
deb http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety main restricted
deb-src http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety main restricted
deb http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-updates main restricted
deb-src http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-updates main restricted
deb http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety universe
deb-src http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety universe
deb http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-updates universe
deb-src http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-updates universe
deb http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety multiverse
deb-src http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety multiverse
deb http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-updates multiverse
deb-src http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-updates multiverse
deb http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-backports main restricted universe multiverse
deb-src http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-backports main restricted universe multiverse
deb http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-security main restricted
deb-src http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-security main restricted
deb http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-security universe
deb-src http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-security universe
deb http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-security multiverse
deb-src http://archive.ubuntu.mirror.rafal.ca/ubuntu/ yakkety-security multiverse