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I have my computer installed choosing the default sources server. Then today I encountered this error:

Err:10 http://cn.archive.ubuntu.com/ubuntu xenial Release                      
  Connection failed [IP: 218.11.10.30 80]
...
Reading package lists... Done
E: The repository 'http://cn.archive.ubuntu.com/ubuntu xenial Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
...

The sources list is here: Ubuntu wiki

I switched several servers in the site above. I also tried apt clean and several methods.

However, when I followed the PackageManagerTroubleshootingProcedure, it worked well when switched to main server.

I wonder why this occurred?

BTW, the server is much faster than the main server for my network, so I prefer to the former one.

  • The local server you were using was probably down at the time. Change it back later and try again. – user692175 Jan 17 '18 at 16:45
  • How did that happen? I think there should be many servers in the whole country. – Ssuching Yu Jan 18 '18 at 3:53
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I change the sources.list to another server(NetEase 163 Mirrors), then the problem was fixed.

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