在ubuntu更新时，出现错误E: Some index files failed to download, they have been ignored, or old ones used inst

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在ubuntu更新时，出现错误E: Some index files failed to download, they have been ignored, or old ones used inst

http://www.ilovn.com/topic/ubuntu-update-error-esome-index-files-failed-to-download-they-have-been-ignored-or-old-ones-used-inst/
在ubuntu更新时

执行命令

sudo apt-get update

出现错误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

$ sudo rm /var/lib/apt/lists/* -vf

再次运行apt-get update