Почему medibuntu.org по-прежнему предлагается в качестве источника пакета, если он был закрыт с 2010 года?

При попытке обновления мой вывод показал, что «не удалось загрузить некоторые индексные файлы» и «они были проигнорированы или вместо них использовались старые». Я что-то неправильно настроил или есть причина, по которой mediubuntu.org по-прежнему указан в качестве опции, если он был выключен? Вот мое обновление:

jeff@bigJeff:~$ sudo apt-get update
Hit http://us.archive.ubuntu.com precise Release.gpg
Hit http://us.archive.ubuntu.com precise-updates Release.gpg                             
Hit http://us.archive.ubuntu.com precise-backports Release.gpg                           
Hit http://security.ubuntu.com precise-security Release.gpg                              
Hit http://ppa.launchpad.net precise Release.gpg                                      
Hit http://us.archive.ubuntu.com precise Release                                      
Hit http://us.archive.ubuntu.com precise-updates Release                              
Hit http://security.ubuntu.com precise-security Release                                  
Hit http://us.archive.ubuntu.com precise-backports Release                               
Hit http://ppa.launchpad.net precise Release                                             
Hit http://security.ubuntu.com precise-security/main Sources                             
Hit http://us.archive.ubuntu.com precise/main Sources                                 
Hit http://us.archive.ubuntu.com precise/restricted Sources                              
Hit http://us.archive.ubuntu.com precise/universe Sources                                
Hit http://us.archive.ubuntu.com precise/multiverse Sources                              
Hit http://us.archive.ubuntu.com precise/main amd64 Packages                             
Hit http://us.archive.ubuntu.com precise/restricted amd64 Packages                       
Hit http://us.archive.ubuntu.com precise/universe amd64 Packages                         
Hit http://us.archive.ubuntu.com precise/multiverse amd64 Packages                       
Hit http://us.archive.ubuntu.com precise/main i386 Packages                              
Hit http://us.archive.ubuntu.com precise/restricted i386 Packages                        
Hit http://security.ubuntu.com precise-security/restricted Sources                       
Hit http://security.ubuntu.com precise-security/universe Sources                         
Hit http://security.ubuntu.com precise-security/multiverse Sources                       
Hit http://security.ubuntu.com precise-security/main amd64 Packages                      
Hit http://security.ubuntu.com precise-security/restricted amd64 Packages             
Hit http://security.ubuntu.com precise-security/universe amd64 Packages               
Hit http://security.ubuntu.com precise-security/multiverse amd64 Packages             
Hit http://security.ubuntu.com precise-security/main i386 Packages                    
Hit http://security.ubuntu.com precise-security/restricted i386 Packages                 
Hit http://security.ubuntu.com precise-security/universe i386 Packages                   
Hit http://us.archive.ubuntu.com precise/universe i386 Packages                          
Hit http://us.archive.ubuntu.com precise/multiverse i386 Packages                        
Hit http://us.archive.ubuntu.com precise/main TranslationIndex                           
Hit http://us.archive.ubuntu.com precise/multiverse TranslationIndex                     
Hit http://us.archive.ubuntu.com precise/restricted TranslationIndex                     
Hit http://us.archive.ubuntu.com precise/universe TranslationIndex                       
Hit http://ppa.launchpad.net precise/main Sources                                        
Hit http://security.ubuntu.com precise-security/multiverse i386 Packages                 
Hit http://security.ubuntu.com precise-security/main TranslationIndex                 
Hit http://us.archive.ubuntu.com precise-updates/main Sources                            
Hit http://us.archive.ubuntu.com precise-updates/restricted Sources                      
Hit http://us.archive.ubuntu.com precise-updates/universe Sources                        
Hit http://us.archive.ubuntu.com precise-updates/multiverse Sources                   
Hit http://us.archive.ubuntu.com precise-updates/main amd64 Packages                     
Hit http://us.archive.ubuntu.com precise-updates/restricted amd64 Packages               
Hit http://us.archive.ubuntu.com precise-updates/universe amd64 Packages                 
Hit http://us.archive.ubuntu.com precise-updates/multiverse amd64 Packages            
Hit http://us.archive.ubuntu.com precise-updates/main i386 Packages                   
Hit http://security.ubuntu.com precise-security/multiverse TranslationIndex           
Hit http://security.ubuntu.com precise-security/restricted TranslationIndex           
Hit http://security.ubuntu.com precise-security/universe TranslationIndex                
Hit http://ppa.launchpad.net precise/main amd64 Packages                                 
Hit http://ppa.launchpad.net precise/main i386 Packages                               
Ign http://ppa.launchpad.net precise/main TranslationIndex                               
Hit http://us.archive.ubuntu.com precise-updates/restricted i386 Packages                
Hit http://us.archive.ubuntu.com precise-updates/universe i386 Packages                  
Hit http://us.archive.ubuntu.com precise-updates/multiverse i386 Packages                
Hit http://us.archive.ubuntu.com precise-updates/main TranslationIndex                   
Hit http://us.archive.ubuntu.com precise-updates/multiverse TranslationIndex          
Hit http://us.archive.ubuntu.com precise-updates/restricted TranslationIndex          
Hit http://us.archive.ubuntu.com precise-updates/universe TranslationIndex               
Hit http://us.archive.ubuntu.com precise-backports/main Sources                          
Hit http://us.archive.ubuntu.com precise-backports/restricted Sources                    
Hit http://us.archive.ubuntu.com precise-backports/universe Sources                      
Hit http://us.archive.ubuntu.com precise-backports/multiverse Sources                    
Hit http://us.archive.ubuntu.com precise-backports/main amd64 Packages                   
Hit http://us.archive.ubuntu.com precise-backports/restricted amd64 Packages             
Hit http://us.archive.ubuntu.com precise-backports/universe amd64 Packages            
Hit http://us.archive.ubuntu.com precise-backports/multiverse amd64 Packages          
Hit http://us.archive.ubuntu.com precise-backports/main i386 Packages                 
Hit http://security.ubuntu.com precise-security/main Translation-en                      
Hit http://security.ubuntu.com precise-security/multiverse Translation-en                
Hit http://us.archive.ubuntu.com precise-backports/restricted i386 Packages              
Hit http://us.archive.ubuntu.com precise-backports/universe i386 Packages                
Hit http://us.archive.ubuntu.com precise-backports/multiverse i386 Packages              
Hit http://us.archive.ubuntu.com precise-backports/main TranslationIndex              
Hit http://us.archive.ubuntu.com precise-backports/multiverse TranslationIndex           
Hit http://us.archive.ubuntu.com precise-backports/restricted TranslationIndex           
Hit http://us.archive.ubuntu.com precise-backports/universe TranslationIndex             
Hit http://us.archive.ubuntu.com precise/main Translation-en                             
Hit http://us.archive.ubuntu.com precise/multiverse Translation-en                       
Hit http://security.ubuntu.com precise-security/restricted Translation-en                
Hit http://security.ubuntu.com precise-security/universe Translation-en                  
Hit http://us.archive.ubuntu.com precise/restricted Translation-en                       
Hit http://us.archive.ubuntu.com precise/universe Translation-en                      
Hit http://us.archive.ubuntu.com precise-updates/main Translation-en                  
Hit http://us.archive.ubuntu.com precise-updates/multiverse Translation-en            
Hit http://us.archive.ubuntu.com precise-updates/restricted Translation-en            
Hit http://us.archive.ubuntu.com precise-updates/universe Translation-en              
Hit http://us.archive.ubuntu.com precise-backports/main Translation-en                
Hit http://us.archive.ubuntu.com precise-backports/multiverse Translation-en          
Hit http://us.archive.ubuntu.com precise-backports/restricted Translation-en          
Hit http://us.archive.ubuntu.com precise-backports/universe Translation-en            
Ign http://ppa.launchpad.net precise/main Translation-en_US     
Ign http://ppa.launchpad.net precise/main Translation-en        
Err http://packages.medibuntu.org precise Release.gpg
  Could not resolve 'packages.medibuntu.org'
Reading package lists... Done             
W: Failed to fetch http://packages.medibuntu.org/dists/precise/Release.gpg  Could not resolve 'packages.medibuntu.org'

W: Some index files failed to download. They have been ignored, or old ones used instead.

lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 12.04.3 LTS
Release:    12.04
Codename:   precise

uname -a

Linux bigJeff 3.8.0-34-generic #49~precise1-Ubuntu SMP Wed Nov 13 18:05:00 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

Мне удалось удалить его из списка источников после Ответьте на этот пост: Как удалить неработающий программный источник?
Это вики, последний раз отредактированный в октябре 2013 года, объясняющий, что он был закрыт: https: // help. ubuntu.com/community/Medibuntu

Еще раз, я просто хочу облегчить путаницу для новичков / новичков в Ubuntu, как и я, и продвигать хорошие методы обеспечения безопасности.