在 Ubuntu 22.04 中我正在运行
sudo do-release-upgrade
并得到
Error during update
A problem occurred during the update. This is usually some sort of
network problem, please check your network connection and retry.
W:Updating from such a repository can't be done securely, and is
therefore disabled by default., W:See apt-secure(8) manpage for
repository creation and user configuration details., E:The repository
'https://ppa.launchpadcontent.net/alexeftimie/ppa/ubuntu jammy
Release' does not have a Release file.
我基本上无法再更新 Ubuntu。发布文件是否导致了问题？我的网络很好，肯定连接到了互联网。