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apt-get 由于某种原因无法工作？

tag-icon • tag-icon apt 16.10
apt-get 由于某种原因无法工作？

由于一些问题，我尝试在 Ubuntu 系统上更新 apt-get

sudo apt-get update

但它给了我这个错误

Hit:1 http://ppa.launchpad.net/webupd8team/java/ubuntu yakkety InRelease       
Ign:2 http://in.archive.ubuntu.com/ubuntu yakkety InRelease                    
Ign:3 http://security.ubuntu.com/ubuntu yakkety-security InRelease
Err:4 http://security.ubuntu.com/ubuntu yakkety-security Release         
  404  Not Found [IP: 91.189.88.149 80]
Ign:5 http://in.archive.ubuntu.com/ubuntu yakkety-updates InRelease
Ign:6 http://in.archive.ubuntu.com/ubuntu yakkety-backports InRelease
Err:7 http://in.archive.ubuntu.com/ubuntu yakkety Release
  404  Not Found [IP: 91.189.88.161 80]
Err:8 http://in.archive.ubuntu.com/ubuntu yakkety-updates Release
  404  Not Found [IP: 91.189.88.161 80]
Err:9 http://in.archive.ubuntu.com/ubuntu yakkety-backports Release
  404  Not Found [IP: 91.189.88.161 80]
Reading package lists... Done
E: The repository 'http://security.ubuntu.com/ubuntu yakkety-security Release' does no longer 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.
E: The repository 'http://in.archive.ubuntu.com/ubuntu yakkety Release' does no longer 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.
E: The repository 'http://in.archive.ubuntu.com/ubuntu yakkety-updates Release' does no longer 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.
E: The repository 'http://in.archive.ubuntu.com/ubuntu yakkety-backports Release' does no longer 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.

我尝试了一些针对“未找到版本”的解决方案，但似乎都不起作用。不知道如何解决这个问题。非常感谢任何帮助。

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