更新ubuntu 19.04至20.04时出错？

Question

我正在尝试将ubuntu 19.04升级到20.20，但出现了如下错误：

update-manager     
Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
For upgrade information, please visit:
http://www.ubuntu.com/releaseendoflife

Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
For upgrade information, please visit:
http://www.ubuntu.com/releaseendoflife

/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcher.py:23: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk, Gdk
/usr/lib/python3/dist-packages/DistUpgrade/ReleaseNotesViewerWebkit.py:33: PyGIWarning: WebKit2 was imported without specifying a version first. Use gi.require_version('WebKit2', '4.0') before import to ensure that the right version gets loaded.
  from gi.repository import WebKit2 as WebKit
authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg' 
extracting 'focal.tar.gz'

Answer 1

这不是个错误。

这是当您错过发布升级窗口时的预期行为。您已经晚了几个月，无法进行版本升级。

• 您剩下的支持发布升级方法是备份您的数据并清理安装支持的Ubuntu版本。
• 有几个不受支持的方法可以try...but，如果遇到问题，我们不会提供有用的帮助。他们没有得到支持。
• 考虑标记您的日历，这样您就不会错过为期三个月的发布升级窗口(10月至1月和4月至7月)。或者考虑迁移到LTS，以便每两年进行一次发布升级。