How to fix apt-get update error on Ubuntu

如果有 Error 會造成無法使用 apt-get install 新的 package, 也會造成無法使用 do-release-upgrade  來升級系統。

apt-get 的 error message:

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

我試過把 /etc/apt/sources.list 先備分之後,再重新下載sources.list,結果一樣。

apt-get update 會失敗,do-release-upgrade 也會失敗。

 

解法:

刪掉 sources.list,建立新的 sources.list 並使用下面的檔案內容。

If your release has reached end of life (EOL), you need to modify /etc/apt/sources.list as follows, in order to avoid 404 errors during apt-get update. Replace CODENAME with the codename of Ubuntu release that you are using.

deb http://old-releases.ubuntu.com/ubuntu/ CODENAME main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ CODENAME-updates main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ CODENAME-security main restricted universe multiverse

附註:deb 並不是指令,而是用來放到 sources.list 的設定用的參數。

 

我的ubuntu 是 15.10 已過 end of life (EOL),所以我的設定值是:

deb http://old-releases.ubuntu.com/ubuntu/ wily main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ wily-updates main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ wily-security main restricted universe multiverse

 

 

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