在Ubuntu 11.10上做发布升级失败

Question

我正在虚拟主机上运行Ubuntu11.10。我已经尝试通过运行do-release-upgrade升级到一个更新的版本，但是这个过程失败了，出现了以下错误(S)。

Err http://ppa.launchpad.net precise/main Translation-en                                                                                                                                                                                    

Err http://ppa.launchpad.net precise/main Translation-en                                                                                                                                                                                    

Err http://ppa.launchpad.net precise/main Sources                                                                                                                                                                                           

Err http://ppa.launchpad.net precise/main amd64 Packages                                                                                                                                                                                    

Err http://ppa.launchpad.net precise/main i386 Packages                                                                                                                                                                                     

Err http://ppa.launchpad.net precise/main Translation-en                                                                                                                                                                                    

Err http://ppa.launchpad.net precise/main Translation-en                                                                                                                                                                                    

Err http://ppa.launchpad.net precise/main Translation-en                                                                                                                                                                                    

Err http://ppa.launchpad.net precise/main Sources                                                                                                                                                                                           
  404  Not Found                                                                                                                                                                                                                            
Err http://ppa.launchpad.net precise/main amd64 Packages                                                                                                                                                                                    
  404  Not Found                                                                                                                                                                                                                            
Err http://ppa.launchpad.net precise/main i386 Packages                                                                                                                                                                                     
  404  Not Found                                                                                                                                                                                                                            
Err http://ppa.launchpad.net precise/main Translation-en                                                                                                                                                                                    

Err http://ppa.launchpad.net precise/main Translation-en                                                                                                                                                                                    

Ign http://ppa.launchpad.net precise/main Translation-en                                                                                                                                                                                    
Ign http://ppa.launchpad.net precise/main Translation-en                                                                                                                                                                                    
Ign http://ppa.launchpad.net precise/main Translation-en                                                                                                                                                                                    
Fetched 0 B in 0s (0 B/s)                                                                                                                                                                                                                   

Error during update 

A problem occurred during the update. This is usually some sort of 
network problem, please check your network connection and retry. 

W:Failed to fetch 
http://ppa.launchpad.net/ferramroberto/java/ubuntu/dists/precise/main/source/Sources 
404 Not Found 
, W:Failed to fetch 
http://ppa.launchpad.net/ferramroberto/java/ubuntu/dists/precise/main/binary-amd64/Packages 
404 Not Found 
, W:Failed to fetch 
http://ppa.launchpad.net/ferramroberto/java/ubuntu/dists/precise/main/binary-i386/Packages 
404 Not Found 
, E:Some index files failed to download. They have been ignored, or 
old ones used instead. 

Restoring original system state

Answer 1

删除ppa并更新：

sudo sudo add-apt-repository --remove ferramroberto/java
sudo apt-get update