更改原配置为最终方案some index files failed to dow
Some index files failed to download. They have been ignored, or old ones used instead.解决方案;
1.删除 /var/lib/apt/lists/所有文件
sudo rm /var/lib/apt/lists/* -vf
有文件夹不能删除的话使用
sudo rm -rf /var/lib/apt/lists/*
sudo rm /var/lib/apt/lists/* -vf
2.再次更新
sudo apt-get update
3.如果还是不行,那可能就是源有问题了,我们更改源配置。