ubuntu系統，關於源（source）的配置

1. 現象：（出現的錯誤）

執行 sudo apt-get update, 報錯：apt-get 404 Not Found Package Repository Errors

執行 sudo apt-get install, 報錯：Some index files failed to download They have been ignored, or old ones used

 

2. 解決方法：

（1）sudo cp  /etc/apt/sources.list    /etc/apt/sources.list_backup

（2）sudo gedit /etc/apt/sources.list

將下面的模板內容，複製粘貼到 /etc/apt/sources.list 文件裏面後，保存就能夠了：（咱們使用的Ubuntu 是16.04）

deb http://cn.archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse deb http://cn.archive.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse deb http://cn.archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse deb http://cn.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse ##測試版源 deb http://cn.archive.ubuntu.com/ubuntu/ xenial-proposed main restricted universe multiverse # 源碼 deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse ##測試版源 deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-proposed main restricted universe multiverse

如今，再執行：

sudo apt-get update

如今就沒有「apt-get 404 Not Found Package Repository Errors」 問題了。

 

參考文獻：https://blog.csdn.net/github_35160620/article/details/52115542