ERRO GPG

FranciscoNunes
(usa Ubuntu)

Enviado em 04/01/2018 - 05:00h

Olá prezados, sou iniciante no mundo do linux e estou gostando muito. Entretanto, apareceu um erro no servidor de chaves públicas que não sai mais! Já tentei e testei tantos tutoriais na Internet que fiquei exausto. Alguém que tenha mais experiência que eu e quiser me ajudar agradeço desde já. Segue logo abaixo um print da tela do terminal logo após o comando: sudo apt-get update

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Baixados 135 kB em 59s (2.244 B/s)
Lendo listas de pacotes... Pronto
W: Erro GPG: http://archive.canonical.com trusty Release: As assinaturas a seguir não puderam ser verificadas devido à chave pública não estar disponível: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: Erro GPG: http://extras.ubuntu.com trusty Release: As assinaturas a seguir não puderam ser verificadas devido à chave pública não estar disponível: NO_PUBKEY 16126D3A3E5C1192
W: Erro GPG: http://archive.canonical.com trusty Release: As assinaturas a seguir não puderam ser verificadas devido à chave pública não estar disponível: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: Erro GPG: http://archive.ubuntu.com trusty-updates InRelease: As assinaturas a seguir não puderam ser verificadas devido à chave pública não estar disponível: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: Erro GPG: http://archive.ubuntu.com trusty-security InRelease: As assinaturas a seguir não puderam ser verificadas devido à chave pública não estar disponível: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
W: Erro GPG: http://archive.ubuntu.com trusty Release: As assinaturas a seguir não puderam ser verificadas devido à chave pública não estar disponível: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32