Este é um problema confirmado: link
Hit:1 http://us.archive.ubuntu.com/ubuntu xenial InRelease
Get:2 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [109 kB]
Err:1 http://us.archive.ubuntu.com/ubuntu xenial InRelease
Could not execute 'apt-key' to verify signature (is gnupg installed?)
Err:2 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease
Could not execute 'apt-key' to verify signature (is gnupg installed?)
Get:3 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease [107 kB]
Err:3 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease
Could not execute 'apt-key' to verify signature (is gnupg installed?)
Get:4 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB]
Err:4 http://security.ubuntu.com/ubuntu xenial-security InRelease
Could not execute 'apt-key' to verify signature (is gnupg installed?)
Get:5 https://deb.nodesource.com/node_4.x xenial InRelease [4,646 B]
Err:5 https://deb.nodesource.com/node_4.x xenial InRelease
Could not execute 'apt-key' to verify signature (is gnupg installed?)
Fetched 327 kB in 0s (572 kB/s)
Reading package lists... Done
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://us.archive.ubuntu.com/ubuntu xenial InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://security.ubuntu.com/ubuntu xenial-security InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://deb.nodesource.com/node_4.x xenial InRelease: Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/xenial/InRelease Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/xenial-updates/InRelease Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/xenial-backports/InRelease Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/InRelease Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: Failed to fetch https://deb.nodesource.com/node_4.x/dists/xenial/InRelease Could not execute 'apt-key' to verify signature (is gnupg installed?)
W: Some index files failed to download. They have been ignored, or old ones used instead.
Nenhuma das soluções no link acima funcionou para mim. Tentei:
-gnupg está instalado
removendo usuário _apt |
-verificando permissões de / tmp
-reinstalando o kernel |
-apt-keys estão instalados (Chave de Assinatura Automática do Ubuntu Archive (2012)) < - isso é muito antigo?