无需重装，能否将KDE Neon转为Ubuntu Bionic并解决包问题？

Got it, let's work through this scenario where your KDE Neon setup is stuck on Xenial, has missing packages, and won't upgrade via do-release-upgrade—and you want to switch to Ubuntu Bionic without a full reinstall. Here's a step-by-step approach that should get you there:

This is non-negotiable. Messing with sources and dist-upgrades can break things if something goes wrong.

• Copy your /home directory to an external drive or cloud storage.
• Back up critical system configs like /etc/apt/sources.list and any custom files in /etc.
• Save KDE-specific settings from ~/.config and ~/.local/share if you want to keep your desktop layout.

KDE Neon is built on Ubuntu, so we'll replace its Xenial sources with Ubuntu Bionic's official repos.

1. Open the main sources list:

   sudo nano /etc/apt/sources.list
   

2. Replace every instance of xenial with bionic.
3. Swap out any neon.kde.org URLs with Ubuntu's official archives. For example, replace:

   deb http://archive.neon.kde.org/user xenial main
   with:
   deb http://archive.ubuntu.com/ubuntu bionic main universe restricted multiverse

4. Disable Neon-specific repo files to avoid conflicts:

   sudo mv /etc/apt/sources.list.d/neon.list /etc/apt/sources.list.d/neon.list.bak
   

   Do the same for any other Neon-related .list files in that directory.

Now let's kick off the dist-upgrade process:

1. Refresh the package cache (ignore any initial warnings about missing repos):

   sudo apt update
   

2. Fix broken dependencies first—this is crucial to avoid upgrade failures:

   sudo apt --fix-broken install
   

3. Start the distribution upgrade:

   sudo apt dist-upgrade
   

   • When prompted about replacing configuration files, choose keep if you want to retain your custom settings, or replace if you want fresh Ubuntu defaults.
   • Let the process run—this will take a while, depending on your internet speed and system size.

It's common to hit a few snags here:

• If a specific package blocks the upgrade, remove it temporarily:

  sudo apt remove problematic-package-name
  

  Then re-run sudo apt dist-upgrade.
• After upgrading, verify your system version:

  lsb_release -a
  

  You should see Release: 18.04 (Bionic Beaver) and Distributor ID: Ubuntu.
• If your KDE desktop is missing or broken, install the official Kubuntu desktop package:

  sudo apt install kubuntu-desktop
  

Finish by tidying up old packages and cached files:

sudo apt autoremove --purge
sudo apt clean

A Quick Note of Caution #

This method isn't 100% guaranteed to be smooth—direct source swaps can sometimes lead to dependency conflicts. But it's a viable alternative to a full reinstall, especially if you have a lot of data or customizations you don't want to lose. Always rely on your backup if something goes sideways.

内容的提问来源于stack exchange，提问作者Ethan McTague