当我尝试从轻快升级到业力我得到这个问题：
root@server:~# sudo do-release-upgrade Checking for a new ubuntu release Done Upgrade tool signature Done Upgrade tool Done downloading extracting 'lucid.tar.gz' authenticate 'lucid.tar.gz' against 'lucid.tar.gz.gpg' tar: Removing leading `/' from member names Reading cache Checking package manager Can not upgrade An upgrade from 'jaunty' to 'lucid' is not supported with this tool. 我不知道为什么它会尝试升级清晰，当我需要先升级到业力。 我想它从某处得到“清醒”这个词，但我不知道从哪里开始寻找。
解决了它。 原来/ etc / update-manager / meta-release指向http://changelogs.ubuntu.com/meta-release ，那个文件说：
Dist: karmic Name: Karmic Koala Version: 9.10 Date: Thu, 29 Oct 2009 12:00:00 UTC Supported: 0 Description: This is the 9.10 release Release-File: http://archive.ubuntu.com/ubuntu/dists/karmic/Release ReleaseNotes: http://changelogs.ubuntu.com/EOLReleaseAnnouncement UpgradeTool: http://archive.ubuntu.com/ubuntu/dists/karmic-proposed/main/dist-upgrader-all/0.126.9/karmic.tar.gz UpgradeToolSignature: http://archive.ubuntu.com/ubuntu/dists/karmic-proposed/main/dist-upgrader-all/0.126.9/karmic.tar.gz.gpg
我下载了文件，将“Supported：0”更改为“Supported：1”，并将该文件托pipe在我自己的web服务器上，并将meta-release指向我的服务器。 完美的工作。
不知道是否有一个原因，使得它不可能做这个升级或如果意外改变支持到0。
另一个scheme
mkdir -pv /tmp/karmic cd /tmp/karmic wget http://old-releases.ubuntu.com/ubuntu/dists/karmic-proposed/main/dist-upgrader-all/0.126.9/karmic.tar.gz tar zxvf karmic.tar.gz ./karmic
重新启动，然后：
do-release-upgrade