Probably solved by following the suggestions at https://gist.github.com/piersharding/ffc505564a82daaf6ff33d951f568dad
In /etc/apt I moved trusted.gpg* in a backup directory and runned "sudo apt-key update". After that I runned "sudo apt-get update": it gave no error or warnings, but apparently it did not accomplish the update. On the contrary, the Software Updater on the GUI made the whole work without any error and correctly updated the system (at least, it seems so). -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apt in Ubuntu. https://bugs.launchpad.net/bugs/1592040 Title: Can't update repos due to signing problems Status in apt package in Ubuntu: Confirmed Bug description: I can't update the repos through 'sudo apt-get update' due to these errors: W: Errore GPG: http://archive.ubuntu.com/ubuntu xenial InRelease: Errore sconosciuto durante l'esecuzione di apt-key W: The repository 'http://archive.ubuntu.com/ubuntu xenial InRelease' is not signed. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. W: Errore GPG: http://archive.ubuntu.com/ubuntu xenial-updates InRelease: Errore sconosciuto durante l'esecuzione di apt-key W: The repository 'http://archive.ubuntu.com/ubuntu xenial-updates InRelease' is not signed. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. W: Errore GPG: http://archive.ubuntu.com/ubuntu xenial-backports InRelease: Errore sconosciuto durante l'esecuzione di apt-key W: The repository 'http://archive.ubuntu.com/ubuntu xenial-backports InRelease' is not signed. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. W: Errore GPG: http://archive.ubuntu.com/ubuntu xenial-security InRelease: Errore sconosciuto durante l'esecuzione di apt-key W: The repository 'http://archive.ubuntu.com/ubuntu xenial-security InRelease' is not signed. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. The /etc/apt/sources.list contains only the official Ubuntu repo since it's untouched from a clean 16.04 install. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1592040/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
