从 18.04 升级到 20.04 错误“无法计算升级”

Question

以下答案来自ubuntuforums.org回答了这个问题。

在做了一些研究之后，我得到了更多关于这个问题的文章，到处都是用户报告的一两个软件包问题是罪魁祸首：例如 python、gqrx-sdr、gnuradio、libomp5、pocl-opencl-icd、clang-6 等。

https://ubuntuforums.org/showthread.php?t=2453051&page=2
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1875523
https://www.mail-archive.com/[电子邮件保护]/msg5920206.html

我使用命令报告了此错误ubuntu-bug ubuntu-release-upgrader-core我使用错误中提到的终端中的https://bugs.launchpad.net/ubuntu/+source/llvm-toolchain-9/+bug/1886748

根据这个链接和上面的链接中的想法，我仔细阅读了“main.log”文件，发现以下几行描述了升级失败的原因。

2023-05-29 22:21:06,111 INFO installing python-is-python2 because python-minimal was installed
2023-05-29 22:21:06,111 DEBUG Installing 'python-is-python2' (python-minimal was installed on the system)
2023-05-29 22:21:06,141 INFO removing python-minimal because python-is-python2 is being installed
2023-05-29 22:21:06,141 DEBUG Removing 'python-minimal' (python-is-python2 is being installed on the system)
2023-05-29 22:21:06,141 INFO failed to remove python-minimal
2023-05-29 22:21:06,142 INFO checking for python-dev (auto_inst=True)
2023-05-29 22:21:06,142 INFO checking for libpython-dev (auto_inst=True)
2023-05-29 22:21:06,142 INFO checking for libpython-stdlib (auto_inst=True)
2023-05-29 22:21:06,142 INFO removing libpython-stdlib because None is being installed
2023-05-29 22:21:06,142 DEBUG Removing 'libpython-stdlib' (None is being installed on the system)
2023-05-29 22:21:06,142 INFO failed to remove libpython-stdlib
2023-05-29 22:21:06,142 INFO checking for libpython-dbg (auto_inst=True)
2023-05-29 22:27:33,918 ERROR Dist-upgrade failed

python-minimal 和 libpython-stdlib 在‘apt.log’中损坏。

Broken libpython2-stdlib:amd64 Breaks on libpython-stdlib:amd64 < 2.7.15~rc1-1 @ii gK > (< 2.7.15-2)
Broken python2-minimal:amd64 Breaks on python-minimal:amd64 < 2.7.15~rc1-1 @ii gK > (< 2.7.15-2)

所以我删除了它：

apt remove python-minimal
apt clean
apt autoclean
apt autoremove

然后再次运行升级do-release-upgrade -p，这次我没有收到与损坏的包相关的错误。

‘apt.log’包含：

Log time: 2023-06-11 15:20:52.293358
Log time: 2023-06-11 15:21:03.127909
Log time: 2023-06-11 15:21:45.739526

‘main.log’包含：

2023-06-11 15:21:41,293 ERROR IOError/SystemError in cache.update(): 'E:Release file for http://security.ubuntu.com/ubuntu/dists/focal-security/InRelease is not valid yet (invalid for another 2h 29min 25s). Updates for this repository will not be applied., E:Release file for http://archive.ubuntu.com/ubuntu/dists/focal-updates/InRelease is not valid yet (invalid for another 2h 30min 53s). Updates for this repository will not be applied.'. Retrying (currentRetry: 2)
2023-06-11 15:21:41,293 ERROR doUpdate() failed completely
2023-06-11 15:21:41,294 DEBUG abort called

因此，我在终端中输入错误报告命令后，按照收到的链接，按照建议将/etc/apt/sources.list文件从 bionic 调整为 focal。

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://ftp.agh.edu.pl/ubuntu/ focal main restricted
# deb-src http://in.archive.ubuntu.com/ubuntu/ bionic main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to ## your rights to use the software. Also, please note that software in ## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://ftp.agh.edu.pl/ubuntu/ focal multiverse
# deb-src http://in.archive.ubuntu.com/ubuntu/ bionic multiverse
# deb-src http://in.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
# deb-src http://security.ubuntu.com/ubuntu bionic-security main restricted
# deb-src http://security.ubuntu.com/ubuntu bionic-security universe
# deb-src http://security.ubuntu.com/ubuntu bionic-security multiverse
deb http://security.ubuntu.com/ubuntu/ focal-security multiverse restricted main
deb http://ftp.agh.edu.pl/ubuntu/ focal-updates multiverse restricted main

我再次运行升级命令，但收到了不同的消息（不再是错误），这是有希望的。

baps@Aspire-A515-51G:~$ sudo do-release-upgrade -p
[sudo] password for baps: 
Checking for a new Ubuntu release  
Please install all available updates for your release before upgrading.

从那时起我就跟随另一篇文章。我按照解决方案2 进行操作。

在这种情况下，运行以下命令来升级状态缓存。

apt clean 
apt autoclean

然后执行以下命令。

sudo apt update 
sudo apt upgrade -y # This installed/upgraded almost 1600 packages, so it took a while. I did a reboot.
sudo apt dist-upgrade # This installed another 250 packages.

我的 Ubuntu 现已升级到 20.04！我不再需要运行命令do-release-upgrade -p或安装 5.4 内核。它使用上述命令自动升级，并且旧的 4.15 内核也被删除了。

baps@Aspire-A515-51G:~$ lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 20.04 
LTSRelease:    20.04
Codename:    focal

Answer 1