升级到不再支持的版本
根据我之前的问题，我希望解决的问题仍然存在。 问题是通过升级，我可以选择升级到13.10。 但是我现在正在运行的12.10在2014年5月结束 – “提供”版本是13.10，但是这个版本在2014年7月结束了！
现在做什么？ 真的希望我能一次做升级，而不是再次买一台新的硬盘进行升级……随着工作时间的到来，这需要：P
我应该升级到13.10然后升级到14.10或14.04还是这个死路一条。 这是高风险的操作等吗？
无法发布图片，所以这里是对话的ASCII版本
[»«][ Software Updater ] _X | | | | +-------+ Software updates are no longer provided for Ubuntu | | | ^ | 12.10 | | | # | | | +-------+ | | To stay secure, you should upgrade to Ubuntu 13.10 | | | | [ Settings... ] [ Upgrade... ] [ OK ] | | | +----------------------------------------------------------------------+ 在[ Upgrade... ] ：
= Upgrading to a no longer supported version = You are about to upgrade to a version of Ubuntu that is no longer supported. The target release of Ubuntu is '''no longer supported''' by Canonical. The support timeframe is between 9 month and 5 years after the initial release. You will not receive security updates or critical bugfixes. See http://www.ubuntu.com/releaseendoflife for details. It is still possible to upgrade this version and eventually you will be able to upgrade to a supported release of Ubuntu. Alternatively you may want to consider to reinstall the machine to the latest version, for more information on this, visit: http://www.ubuntu.com/desktop/get-ubuntu For pre-installed system you may want to contact the manufacturer for instructions. == Feedback and Helping == If you would like to help shape Ubuntu, take a look at the list of ways you can participate at http://www.ubuntu.com/community/participate/ Your comments, bug reports, patches and suggestions will help ensure that our next release is the best release of Ubuntu ever. If you feel that you have found a bug please read: http://help.ubuntu.com/community/ReportingBugs Then report bugs using apport in Ubuntu. For example: ubuntu-bug linux will open a bug report in Launchpad regarding the linux package. If you have a question, or if you think you may have found a bug but aren't sure, first try asking on the #ubuntu or #ubuntu-bugs IRC channels on Freenode, on the Ubuntu Users mailing list, or on the Ubuntu forums: http://help.ubuntu.com/community/InternetRelayChat http://lists.ubuntu.com/mailman/listinfo/ubuntu-users http://www.ubuntuforums.org/ == More Information == You can find out more about Ubuntu on our website, IRC channel and wiki. If you're new to Ubuntu, please visit: http://www.ubuntu.com/ To sign up for future Ubuntu announcements, please subscribe to Ubuntu's very low volume announcement list at: http://lists.ubuntu.com/mailman/listinfo/ubuntu-announce
对于这种特殊情况，唯一快速，简单，不太容易升级的问题，使用较少的带宽，并在社区和新的更新的支持下，备份您需要的文件，然后继续安装Ubuntu 14.04.1 LiveDVD或LiveUSB，删除之前的所有内容。
您将备份您的文件，并且将使用最新的14.04.1，花费更少的时间和更少的问题。
更改sources.list文件以指向旧文件并开始从12.10升级到更新的受支持版本将是一项巨大的浪费。 因此，您最安全，最简单的方法是直接从Live媒体安装14.04.1，并备份您需要的任何重要文件。
如果您已创建/home分区，甚至更好，只需告诉14.04.1安装，您将使用已存在的/home分区作为14.04.1安装的/home 。 您可以通过选择手动或高级方式来提示如何处理现有的Ubuntu安装（显示覆盖的窗口，删除旧的ubuntu并安装新的等等）。
尝试更改/etc/apt/sources.list以指向旧存储库。
备份来源：
sudo cp -v /etc/apt/sources.{list,backup}
更改sources.list
sudo sed -i 's/us.archive/old-releases/' /etc/apt/sources.list
然后跑
sudo apt-get update && sudo apt-get upgrade && sudo apt-get dist-upgrade
然后跑
sudo do-release-upgrade