尝试更新到 Ubuntu 18.04 后，我遇到了一个问题。当我重新启动系统时，Ubuntu 以终端模式启动。我想在不重新安装操作系统的情况下修复此问题。我尝试从 grub 恢复模式启动，但没有帮助。
然后我尝试输入命令，结果显示这里。运行此命令后出现错误。
dpkg --configure -a
他们来了：
dpkg: error processing package neon-desktop (--configure)
dependencies problem - leaving unconfigured
我尝试运行sudo apt-get install --reinstall neon-desktop，但收到以下未满足的依赖项错误。
sudo apt install --reinstall neon-desktop
[sudo] password for kocmuk:
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
neon-desktop : Depends: baloo-kf5 but it is not going to be installed
Depends: breeze but it is not going to be installed
Depends: distro-release-notifier but it is not going to be installed
Depends: kde-cli-tools but it is not going to be installed
Depends: khotkeys but it is not going to be installed
Depends: kio but it is not going to be installed
Depends: kio-extras but it is not going to be installed
Depends: kkmenuedit but it is not going to be installed
Depends: ksysguard but it is not going to be installed
Depends: distro-release-notifier but it is not going to be installed
Depends: kwin but it is not going to be installed
Depends: kwrited but it is not going to be installed
Depends: plasma-desktop but it is not going to be installed
Depends: powerdevil but it is not going to be installed
Depends: sdd-theme-breeze but it is not going to be installed
Depends: systemsettings but it is not going to be installed
Depends: xorg but it is not going to be installed
Recommends: ark but it is not going to be installed
Recommends: bluedevil but it is not going to be installed
Recommends: dolphin but it is not going to be installed
Recommends: drkonqi-pk-debug-installer but it is not going to be installed
Recommends: frameworkintegration but it is not going to be installed
Recommends: gwenview but it is not going to be installed
Recommends: kde-config-gtk-style but it is not going to be installed
Recommends: kde-config-plymouth but it is not going to be installed
Recommends: kde-config-sddn but it is not going to be installed
Recommends: kde-spectacle but it is not going to be installed
Recommends: kdegraphics but it is not going to be installed
Recommends: kdialog but it is not going to be installed
Recommends: konsole but it is not going to be installed
Recommends: kscreen but it is not going to be installed
Recommends: ksshaskpass but it is not going to be installed
Recommends: kwin-addons but it is not going to be installed
Recommends: kwrite but it is not going to be installed
Recommends: milou but it is not going to be installed
Recommends: okular but it is not going to be installed
Recommends: plasma-browser-integration but it is not going to be installed
Recommends: plasma-calendar-addons but it is not going to be installed
Recommends: plasma-dataengines but it is not going to be installed
Recommends: plasma-discover but it is not going to be installed
Recommends: plasma-discover-updater but it is not going to be installed
Recommends: plasma-nm but it is not going to be installed
Recommends: plasma-pa but it is not going to be installed
Recommends: plasma-runners-addons but it is not going to be installed
Recommends: plasma-vault but it is not going to be installed
Recommends: plasma-wallpapers-addons but it is not going to be installed
Recommends: plasma-widgets-addons but it is not going to be installed
Recommends: plasma-workspace-wayland but it is not going to be installed
Recommends: polkit-kde-agent-1 but it is not going to be installed
Recommends: print-manager but it is not going to be installed
Recommends: user-manager but it is not going to be installed
Recommends: xserver-xorg-input-evdev but it is not going to be installed
Recommends: xserver-xorg-input-synaptics but it is not going to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).
答案1
升级到新的 Ubuntu 版本后，第三方存储库和 ppa 将被禁用。您需要检查它们是否支持新版本（就您而言bionic）并将它们更改为新版本。然后您可以重新启用它们。
sources.list在文件中找到 KDE Neon 存储库的相关条目
看起来应该是这样的：
# deb http://archive.neon.kde.org/user xenial main
根据您的安装方式，您会在 /etc/apt/sources.list或（更可能） 中的某个文件中找到它/etc/apt/sources.list.d/。
您也可以使用以下命令来查找该文件：
grep -rlF 'archive.neon.kde.org' /etc/apt/
更改xenial为，然后通过从该行中bionic删除 来重新启用存储库。#
然后运行：
sudo apt-get update
sudo apt-get install -f