我知道升级 ubuntu-advantage-tools 时出错以及相应的错误。我检查并确保我的机器上有 Richard Harding 提供的最新补丁。我还安装了 cloud-id（之前没有安装），但问题仍然存在。即：
sudo apt upgrade --fix-missing
[sudo] password for mbajpai:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
apache2-bin apache2-data apache2-utils libgs9-common
The following packages will be upgraded:
libfprint-2-2 ubuntu-advantage-tools
2 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
Need to get 1,065 kB of archives.
After this operation, 94.2 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Err:1 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 ubuntu-advantage-tools amd64 27.4.2~20.04.1
404 Not Found [IP: 91.189.91.38 80]
Err:2 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 libfprint-2-2 amd64 1:1.90.2+tod1-0ubuntu1~20.04.5
404 Not Found [IP: 91.189.91.38 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/u/ubuntu-advantage-tools/ubuntu-advantage-tools_27.4.2~20.04.1_amd64.deb 404 Not Found [IP: 91.189.91.38 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/libf/libfprint/libfprint-2-2_1.90.2+tod1-0ubuntu1~20.04.5_amd64.deb 404 Not Found [IP: 91.189.91.38 80]
在此之前，我运行了：
sudo dpkg --configure -a
sudo apt update
Hit:1 https://nvidia.github.io/libnvidia-container/stable/ubuntu18.04/amd64 InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu focal InRelease
Get:3 https://nvidia.github.io/nvidia-container-runtime/stable/ubuntu18.04/amd64 InRelease [1,481 B]
Get:4 https://nvidia.github.io/nvidia-docker/ubuntu18.04/amd64 InRelease [1,474 B]
Hit:5 https://download.docker.com/linux/ubuntu focal InRelease
Hit:6 http://us.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:7 http://us.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:8 http://security.ubuntu.com/ubuntu focal-security InRelease
Fetched 2,955 B in 2s (1,375 B/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
10 packages can be upgraded. Run 'apt list --upgradable' to see them.
我想我可以删除libfprint-2-2，但ubuntu-advantage-tools似乎更根本。请指教。
编辑：根据要求提供附加信息：
sudo apt-f 安装
[sudo] password for ****:
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 53 not upgraded.
猫/etc/apt/sources.list
# deb cdrom:[Ubuntu 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20180725)]/ bionic main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us.archive.ubuntu.com/ubuntu/ focal main restricted
# deb-src http://us.archive.ubuntu.com/ubuntu/ bionic main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ focal-updates main restricted
# deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ focal universe
# deb-src http://us.archive.ubuntu.com/ubuntu/ bionic universe
deb http://us.archive.ubuntu.com/ubuntu/ focal-updates universe
# deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-updates universe
## 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://us.archive.ubuntu.com/ubuntu/ focal multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ bionic multiverse
deb http://us.archive.ubuntu.com/ubuntu/ focal-updates multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu bionic partner
# deb-src http://archive.canonical.com/ubuntu bionic partner
deb http://security.ubuntu.com/ubuntu focal-security main restricted
# deb-src http://security.ubuntu.com/ubuntu bionic-security main restricted
deb http://security.ubuntu.com/ubuntu focal-security universe
# deb-src http://security.ubuntu.com/ubuntu bionic-security universe
deb http://security.ubuntu.com/ubuntu focal-security multiverse
# deb-src http://security.ubuntu.com/ubuntu bionic-security multiverse
答案1
尝试了同样的步骤，重启，两天后一切正常。我相信重启清除了一些缓存。
sudo apt 升级
Get:2 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 ubuntu-advantage-tools amd64 27.5~20.04.1 [861 kB]
...
Get:8 http://us.archive.ubuntu.com/ubuntu focal-updates/main amd64 libfprint-2-2 amd64 1:1.90.2+tod1-0ubuntu1~20.04.6 [207 kB]