跑步
$ sudo apt install
导致这个错误。
$ The package linux-hwe-5.4-headers-5.4.0-51 needs to be reinstalled, but I can't find an archive for it.
有什么想法如何解决吗？
$cat /etc/apt/sources.list 的详细信息
mike@MikeUbuntu3:~$ cat /etc/apt/sources.list
# deb cdrom:[Ubuntu 18.04.3 LTS _Bionic Beaver_ - Release amd64 (20190805)]/ 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
deb http://archive.ubuntu.com/ubuntu bionic main universe restricted multiverse
deb-src http://archive.ubuntu.com/ubuntu bionic main multiverse restricted universe #Added by software-properties
答案1
您的 sources.list 文件中缺少bionic-security和bionic-updates（此缺失的包由 提供bionic-updates）。
运行以下命令来修复此问题。
首先备份您的 sources.list 文件：
sudo cp /etc/apt/sources.list /etc/apt/sourceslistbackup
现在，添加缺失的行：
echo 'deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates main restricted universe multiverse' | sudo tee -a /etc/apt/sources.list
echo 'deb http://security.ubuntu.com/ubuntu bionic-security main restricted universe multiverse' | sudo tee -a /etc/apt/sources.list
最后，更新并完成升级：
sudo apt update
sudo apt install --reinstall linux-hwe-5.4-headers-5.4.0-51
sudo apt -f install
sudo apt dist-upgrade