小编R. *_*ung的帖子

首先，我已经浏览了与此错误相关的所有先前问题，但没有任何效果。以下是我的输出sudo apt-get update：

在一篇旧帖子之后，我最终更改了我的整个sources.list文件。

Get:1 http://archive.canonical.com/ubuntu xenial InRelease [3,537 B]
Err:1 http://archive.canonical.com/ubuntu xenial InRelease                     
  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Get:2 http://archive.ubuntu.com/ubuntu xenial InRelease [3,534 B]              
Err:2 http://archive.ubuntu.com/ubuntu xenial InRelease
  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Get:3 http://archive.ubuntu.com/ubuntu xenial-updates InRelease [3,542 B]
Err:3 http://archive.ubuntu.com/ubuntu xenial-updates InRelease
  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Get:4 http://archive.ubuntu.com/ubuntu xenial-backports InRelease [3,544 B]
Err:4 http://archive.ubuntu.com/ubuntu xenial-backports …