无法从 18.04 升级 ubuntu 20.04

Question

尝试将ubuntu从18.04升级到20.04，但软件更新程序不显示升级选项。所以我尝试在命令行中执行此操作。

执行以下命令后：

sudo apt update
sudo apt upgrade
sudo apt dist-upgrade
sudo apt autoremove
sudo do-release-upgrade -d -f DistUpgradeViewGtk3

得到结果

sudo do-release-upgrade -d -f DistUpgradeViewGtk3
Checking for a new Ubuntu release
Failed to connect to https://changelogs.ubuntu.com/meta-release-development. Check your Internet connection or proxy settings
Upgrades to the development release are only 
available from the latest supported release.

有什么想法吗？谢谢

Answer 1

解决一下吧，看来我的openssl有问题。所以我按照 https://github.com/openssl/openssl/issues/5845 让软件更新程序再次工作。

实际上，修复SSL后，它仍然显示

Failed to connect to https://changelogs.ubuntu.com/meta-release. Check your Internet connection or proxy settings
No new release found.

然后我发现 https://ubuntu-mate.community/t/cant-update-upgrade-anymore-um-18-04-v2-lts/19745/3
进行了编辑/etc/update-manager/meta-release

https://changelogs.ubuntu.com/meta-release  
https://changelogs.ubuntu.com/meta-release-lts 

到

http://changelogs.ubuntu.com/meta-release  
http://changelogs.ubuntu.com/meta-release-lts

那么效果很好！