Ubuntu sudo apt get update 404 Not Found问题

Question

我正在使用 Ubuntu 20.04.3 LTS。我已经遇到错误 2 天了，即由于以下错误，我无法在系统上更新或升级或执行软件包安装：

Hit:1 http://packages.microsoft.com/repos/code stable InRelease                                                                   
Hit:2 http://archive.canonical.com/ubuntu focal InRelease                                                                         
Hit:3 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu focal InRelease                                                              
Hit:4 http://dl.google.com/linux/chrome/deb stable InRelease                                                                      
Ign:5 http://old-releases.ubuntu.com/ubuntu focal InRelease                                                                       
Ign:6 http://old-releases.ubuntu.com/ubuntu focal-updates InRelease                                                               
Hit:7 http://ppa.launchpad.net/kicad/kicad-5.1-releases/ubuntu focal InRelease                                                    
Hit:8 https://deb.opera.com/opera-stable stable InRelease                                                                         
Hit:9 https://packages.microsoft.com/repos/vscode stable InRelease                                                                
Ign:10 http://old-releases.ubuntu.com/ubuntu focal-backports InRelease                                                            
Ign:11 http://ppa.launchpad.net/team-gcc-arm-embedded/ppa/ubuntu focal InRelease                                           
Ign:12 http://old-releases.ubuntu.com/ubuntu focal-security InRelease                                                      
Err:14 http://old-releases.ubuntu.com/ubuntu focal Release                                                                        
  404  Not Found [IP: 91.189.88.247 80]
Err:15 http://ppa.launchpad.net/team-gcc-arm-embedded/ppa/ubuntu focal Release                                                    
  404  Not Found [IP: 91.189.95.85 80]
Err:16 http://old-releases.ubuntu.com/ubuntu focal-updates Release                                                           
  404  Not Found [IP: 91.189.88.247 80]
Hit:17 https://linux-clients.seafile.com/seafile-deb/focal stable InRelease                
Err:18 http://old-releases.ubuntu.com/ubuntu focal-backports Release 
  404  Not Found [IP: 91.189.88.247 80]
Err:19 http://old-releases.ubuntu.com/ubuntu focal-security Release  
  404  Not Found [IP: 91.189.88.247 80]
Ign:13 https://launchpad.net/~terry.guo/+archive/gcc-arm-embedded focal InRelease
Err:20 https://launchpad.net/~terry.guo/+archive/gcc-arm-embedded focal Release
  404  Not Found [IP: 91.189.89.222 443]
Reading package lists... Done

我该如何解决这个问题？

Answer 1

您的大多数存储库和 PPAsources.list不再可用并且抛出错误。我建议恢复默认存储库。

1. 首先，使用以下命令恢复默认存储库：

   mkdir ~/solution
   cd ~/solution/
   
   cat << EOF > ~/solution/sources.list
   deb http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse
   deb-src http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse
   
   deb http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse
   deb-src http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse
   
   deb http://archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
   deb-src http://archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
   
   deb http://archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
   deb-src http://archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
   
   deb http://archive.canonical.com/ubuntu focal partner
   deb-src http://archive.canonical.com/ubuntu focal partner
   EOF
   
   sudo sed -i "s/focal/$(lsb_release -c -s)/" ~/solution/sources.list
   sudo rm /etc/apt/sources.list
   sudo cp ~/solution/sources.list /etc/apt/sources.list
   

2. 删除系统中的所有 PPA：

   sudo mv /etc/apt/sources.list.d/* ~/solution
   

3. 更新存储库：

   sudo apt update
   

可以了，好了！