小编Ron*_*ver的帖子

当我更新我的 ubuntu 14.10 时出现错误

这是一个错误：

Err http://ppa.launchpad.net utopic/main amd64 Packages                        
  404  Not Found
Err http://ppa.launchpad.net utopic/main i386 Packages                         
  404  Not Found
Ign http://kambing.ui.ac.id trusty/universe Translation-en_US                  
Fetched 22,6 MB in 4min 12s (89,5 kB/s)                                        
W: Failed to fetch http://ppa.launchpad.net/tualatrix/ppa/ubuntu/dists/utopic/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/tualatrix/ppa/ubuntu/dists/utopic/main/binary-i386/Packages  404  Not Found

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

我该怎么做才能解决这个错误？