分发升级问题“未找到新版本”

Question

我正在使用 Ubuntu 11.04。更新管理器曾经发现新版本“oneiric”，当我使用 ssh 登录时仍然显示此屏幕：

Welcome to Ubuntu 11.04 (GNU/Linux 2.6.38-14-generic x86_64)

 * Documentation:  https://help.ubuntu.com/

0 packages can be updated.
0 updates are security updates.

New release 'oneiric' available.
Run 'do-release-upgrade' to upgrade to it.

Last login: Wed Apr 25 16:22:48 2012 from ***

但是我当时没有升级，也没有更改我的 apt 源。现在我无法升级到“oneiric”。do-relase-upgrade显示：

$ sudo do-release-upgrade
Checking for a new ubuntu release
No new release found
$

并apt-get dist-upgrade显示：

$ sudo apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
$

我可以成功更新我的所有软件包。

---

source.list 的文件内容：

$ cat /etc/apt/sources.list
## See sources.list(5) for more information, especialy
# Remember that you can only use http, ftp or file URIs

deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ natty main universe restricted multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ natty main universe restricted multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ natty-security universe main multiverse restricted
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ natty-security universe main multiverse restricted
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ natty-updates universe main multiverse restricted
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ natty-updates universe main multiverse restricted
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ natty-backports universe main multiverse restricted
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu/ natty-backports universe main multiverse restricted


# deb http://ubuntu.dormforce.net/ubuntu/ lucid main universe restricted multiverse
# deb-src http://ubuntu.dormforce.net/ubuntu/ lucid main universe restricted multiverse
# deb http://ubuntu.dormforce.net/ubuntu/ lucid-security universe main multiverse restricted
# deb-src http://ubuntu.dormforce.net/ubuntu/ lucid-security universe main multiverse restricted
# deb http://ubuntu.dormforce.net/ubuntu/ lucid-updates universe main multiverse restricted
# deb-src http://ubuntu.dormforce.net/ubuntu/ lucid-updates universe main multiverse restricted

# CDROMs are managed through the apt-cdrom tool.
# deb http://archive.canonical.com lucid partner
# deb http://archive.canonical.com lucid-security partner
# deb http://archive.canonical.com lucid-updates partner
# deb-src http://archive.canonical.com lucid partner
# deb-src http://archive.canonical.com lucid-security partner
# deb-src http://archive.canonical.com lucid-updates partner


#medibuntu repo
# deb http://packages.medibuntu.org/ lucid free non-free
# deb-src http://packages.medibuntu.org/ lucid free non-free

# deb http://extras.ubuntu.com/ubuntu maverick main #Third party developers repository
deb http://mirrors.sohu.com/ubuntu/ natty main restricted multiverse universe
deb-src http://mirrors.sohu.com/ubuntu/ natty main universe restricted multiverse #Added by software-properties
deb http://security.ubuntu.com/ubuntu/ natty-security universe main multiverse restricted
deb-src http://mirrors.sohu.com/ubuntu/ natty-security universe main multiverse restricted
deb http://mirrors.sohu.com/ubuntu/ natty-updates universe main multiverse restricted
deb-src http://mirrors.sohu.com/ubuntu/ natty-updates universe main multiverse restricted

/etc/update-manager/meta-release 的文件内容：

$ cat /etc/update-manager/meta-release
# default location for the meta-release file

[METARELEASE]
URI = http://changelogs.ubuntu.com/meta-release
URI_LTS = http://changelogs.ubuntu.com/meta-release-lts
URI_UNSTABLE_POSTFIX = -development
URI_PROPOSED_POSTFIX = -proposed

这可能是什么问题？

Answer 1

查看 /etc/update-manager/release-upgrades

Prompt=lts

如果您当前使用的版本不是LTS版本，则会导致升级失败。

解决方案：

更改Prompt=lts到Prompt=normal并保存更改

执行所需的升级，直到安装 LTS 版本。

然后改回 Prompt=lts

完毕。

Answer 2

要从服务器或系统上的 Ubuntu 11.10 或 Ubuntu 10.04 LTS 升级：update-manager-core如果尚未安装，请安装该软件包；使用命令启动升级工具sudo do-release-upgrade -d；并按照屏幕上的说明进行操作。请注意，服务器升级现在更加强大，将利用 GNU 屏幕并在出现连接断开等问题时自动重新连接。

Answer 3

一种可能的原因是发布可用的图章文件不正确地挂起。以下解决了这个问题：

sudo rm /var/lib/ubuntu-release-upgrader/release-upgrade-available

这个文件可以安全删除，因为它会在下次运行 motd 脚本时重新生成（如果合适的话）。

原因：在我使用 apt-get distupgrade 完成了部分完成的版本升级之后，我在 13.04 中出现了这个问题。如果图章文件/var/lib/ubuntu-release-upgrader/release-upgrade-available存在并且有新版本可用的消息，它会在每次登录时通过 motd 脚本显示：/etc/update-motd.d/91-release-upgrade，/usr/lib/ubuntu-release-upgrader/release-upgrade-motd如果图章为空，则调用更新图章。有关为什么会出现这种情况的更多信息，请参阅这些文件。