W: Ignorando a aquisição do arquivo configurado 'main / binary-1386 / Packages' como repositório… não suporta arquitetura '1386' [duplicado]

Question

Recentemente, comecei a ter dificuldades com o Atualizador de Software. Quando tento executá-lo, recebo a mensagem:

Failed to download repository information. Check your internet connection.

Minha conexão está funcionando bem, então tenho certeza que deve ser outra coisa. Abaixo está a saída da entrada Detalhes como código, porque era a única maneira que eu poderia encontrar que me permitiria incluí-lo.

W:Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial InRelease' doesn't support architecture '1386', 
W:Skipping acquire of configured file 'restricted/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial InRelease' doesn't support architecture '1386',
W:Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial-updates InRelease' doesn't support architecture '1386',
W:Skipping acquire of configured file 'restricted/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial-updates InRelease' doesn't support architecture '1386',
W:Skipping acquire of configured file 'multiverse/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial-updates InRelease' doesn't support architecture '1386',
W:Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial-backports InRelease' doesn't support architecture '1386',
W:Skipping acquire of configured file 'restricted/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial-backports InRelease' doesn't support architecture '1386',
W:Skipping acquire of configured file 'universe/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial-backports InRelease' doesn't support architecture '1386',
W:Skipping acquire of configured file 'multiverse/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial-backports InRelease' doesn't support architecture '1386',
W:Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial-security InRelease' doesn't support architecture '1386',
W:Skipping acquire of configured file 'restricted/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial-security InRelease' doesn't support architecture '1386',
W:Skipping acquire of configured file 'universe/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial-security InRelease' doesn't support architecture '1386',
W:Skipping acquire of configured file 'multiverse/binary-1386/Packages' as repository 'http://mirror.steadfast.net/ubuntu xenial-security InRelease' doesn't support architecture '1386', 
W:Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://ppa.launchpad.net/fkrull/deadsnakes/ubuntu xenial InRelease' doesn't support architecture '1386',
W:Skipping acquire of configured file 'universe/binary-1386/Packages' as repository 'http://repos.codelite.org/wx3.0.3/ubuntu zesty InRelease' doesn't support architecture '1386', 
W:Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://ppa.launchpad.net/webupd8team/java/ubuntu xenial InRelease' doesn't support architecture '1386',
W:The repository 'http://ppa.launchpad.net/pcf/miro-releases/ubuntu xenial Release' does not have a Release file.,
W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use.,
W:See apt-secure(8) manpage for repository creation and user configuration details.,
W:Skipping acquire of configured file 'main/binary-1386/Packages' as repository 'http://ppa.launchpad.net/webupd8team/tor-browser/ubuntu xenial InRelease' doesn't support architecture '1386', 
E:Failed to fetch http://ppa.launchpad.net/pcf/miro-releases/ubuntu/dists/xenial/main/binary-amd64/Packages  404  Not Found,
E:Some index files failed to download. They have been ignored, or old ones used instead.'

A execução dos seguintes comandos não produziu saída.

grep -i 1386 /etc/apt/sources.list
grep -i 1386 /etc/apt/sources.list.d/*.list

    

Answer 1

Seu computador está configurado com um tipo de arquitetura incorreto.

Em terminal ...

Vamos ver o que temos agora ...

sudo dpkg --print-architecture
    # could show amd64
sudo dpkg --print-foreign-architectures # note the ending s
    # could show 1386 <-- this is the bad one

Permite corrigir o problema ...

sudo dpkg --remove-architecture 1386 # delete the bad one
sudo dpkg --add-architecture i386 # add a good one

Atualização # 1:

O erro E:Failed to fetch http://ppa.launchpad.net/pcf/miro-releases/ubuntu/dists/xenial é porque não existe repositório xenial.

Em terminal ...

cd /etc/apt/sources.list.d
grep -i miro-releases *.list
    # note the filename that is returned
gksudo gedit /etc/apt/sources.list.d/{enter found filename here}
    # comment out the deb lines by placing a # at the beginning of the lines
    # save the file and quit gedit