从14.04更新到16.04失败，出现GPG错误
升级后的apt-get更新 – 我得到以下消息
W: GPG error: http://archive.canonical.com/ubuntu xenial InRelease: At least one invalid signature was encountered. W: The repository 'http://archive.canonical.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: GPG error: http://ua.archive.ubuntu.com/ubuntu xenial InRelease: At least one invalid signature was encountered. W: The repository 'http://ua.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: GPG error: http://ua.archive.ubuntu.com/ubuntu xenial-security InRelease: At least one invalid signature was encountered. W: The repository 'http://ua.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. W: GPG error: http://ua.archive.ubuntu.com/ubuntu xenial-updates InRelease: At least one invalid signature was encountered. W: The repository 'http://ua.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: GPG error: http://ua.archive.ubuntu.com/ubuntu xenial-proposed InRelease: At least one invalid signature was encountered. W: The repository 'http://ua.archive.ubuntu.com/ubuntu xenial-proposed 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: GPG error: http://ua.archive.ubuntu.com/ubuntu xenial-backports InRelease: At least one invalid signature was encountered. W: The repository 'http://ua.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. 试着
sudo apt-get clean sudo mv /var/lib/apt/lists /tmp sudo mkdir -p /var/lib/apt/lists/partial sudo apt-get clean sudo apt-get update
它没有帮助。
我目前的source.list：
###### Ubuntu Main Repos deb http://ua.archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse ###### Ubuntu Update Repos deb http://ua.archive.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse deb http://ua.archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse deb http://ua.archive.ubuntu.com/ubuntu/ xenial-proposed main restricted universe multiverse deb http://ua.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse ###### Ubuntu Partner Repo deb http://archive.canonical.com/ubuntu xenial partner
使用rm -rf /etc/apt/trusted.gpg.d/*修复它
显然，尽管这些存储库被禁用，但某些旧存储库的gpg仍在搞乱。