某些索引文件下載失敗 - Linux Mint 17.1 Cinnamon

執行sudo apt-get update我收到以下錯誤消息：

...
Ign http://packages.linuxmint.com rebecca/upstream Translation-en_US           
Ign http://packages.linuxmint.com rebecca/upstream Translation-en              
Fetched 3.039 kB in 36s (83,1 kB/s)                                            
N: Ignoring file 'getdeb.list.bck' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/rebecca-getdeb/apps/binary-amd64/Packages  404  Not Found [IP: 104.28.24.125 80]

W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/rebecca-getdeb/apps/binary-i386/Packages  404  Not Found [IP: 104.28.24.125 80]

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

此外，找出文件夾/etc/apt/sources.list.d我既不能刪除產生問題的文件也不能修改它；我只能打開它來查看文本文件內容。

有人可以提出解決方案並提供一些參考嗎？

執行以下命令：

gksu nautilus
sudo rm /etc/apt/sources.list.d/getdeb.list.bck

您可以刪除該文件。在這裡，您可以找到有關解決過程的更多說明。

引用自：https://unix.stackexchange.com/questions/194238