apt-get 失败

当运行apt-get update后出现如下错误时：

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

可以将目录下 /var/lib/apt/lists/partial/ 所有的文件清掉，

输入以下命令:

sudo rm -r /var/lib/apt/lists/partial/
sudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock

再次运行 apt-get update 即可！