升级到 20.04 时面对身份验证失败

Question

$ sudo do-release-upgrade -d 
Checking for a new Ubuntu release
Get:1 Upgrade tool signature [1,554 B]                                                                                                 
Get:2 Upgrade tool [1,342 kB]                                                                                                          
Fetched 1,343 kB in 6s (84.2 kB/s)                                                                                                     
authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg' 
Authentication failed
Authenticating the upgrade failed. There may be a problem with the network or with the server. 

仅供参考：我已经试过了sudo apt-get install --reinstall ubuntu-keyring。我还尝试将服务器更改为“主服务器”，但它仍然对我不起作用。

Answer 1

我不确定是否应该推荐接受的答案，因为我想象正常的升级过程会做很多其他事情？

我遇到了与原始海报相同的问题，并发现它丢失了（未记录）gpg 密钥。有关信息，我安装的系统真的很旧，从 13.10 安装开始，经过多年的更新，所以我想这就是为什么存在一些公钥问题的原因。

首先我检查了这两个文件 apt-key verify focal.tar.gz.gpg focal.tar.gz

这表明我缺少检查签名的密钥。

如果您的文件tmp夹中没有这些文件，您可以下载它们并进行验证：

http://archive.ubuntu.com/ubuntu/dists/focal-updates/main/dist-upgrader-all/current/focal.tar.gz http://archive.ubuntu.com/ubuntu/dists/focal-updates /main/dist-upgrader-all/current/focal.tar.gz.gpg

gpgv: Signature made jeu. 03 sept. 2020 15:23:39 CEST
gpgv:                using RSA key 3B4FE6ACC0B21F32
gpgv: Good signature from "Ubuntu Archive Automatic Signing Key (2012) ftpmaster@ubuntu.com"
gpgv: Signature made jeu. 03 sept. 2020 15:23:39 CEST
gpgv:                using RSA key 871920D1991BC93C
gpgv: Can't check signature: No public key

然后我通过以下方式添加了丢失的公钥： sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 871920D1991BC93C

之后更新运行正常。

Answer 2

现在我可以在替换以下内容后升级到 ubuntu 20.04/etc/apt/sources.list

deb http://in.archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse
deb-src http://in.archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse

deb http://in.archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://in.archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse

deb http://in.archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://in.archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse

deb http://in.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://in.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse

deb http://archive.canonical.com/ubuntu focal partner
deb-src http://archive.canonical.com/ubuntu focal partner