为什么我收到错误101？ 我的DNS如何参与？

我得到的Update information is outdated 。 我尝试了sudo apt-get update并得到了这些错误：

 W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/Release.gpg Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://repository.spotify.com/dists/stable/Release.gpg Something wicked happened resolving 'repository.spotify.com:http' (-11 - System error) W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/main/i18n/Translation-en_IN Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/main/i18n/Translation-en Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/multiverse/i18n/Translation-en_IN Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/multiverse/i18n/Translation-en Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/restricted/i18n/Translation-en_IN Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/restricted/i18n/Translation-en Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/universe/i18n/Translation-en_IN Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/universe/i18n/Translation-en Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/universe/source/Sources Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/main/source/Sources Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/multiverse/source/Sources Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/restricted/source/Sources Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/main/binary-i386/Packages Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/restricted/binary-i386/Packages Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/universe/binary-i386/Packages Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/multiverse/binary-i386/Packages Cannot initiate the connection to security.ubuntu.com:80 (2001:67c:1562::13). - connect (101: Network is unreachable) [IP: 2001:67c:1562::13 80] E: Some index files failed to download. They have been ignored, or old ones used instead. 

我按照这个主题的最佳答案解决了问题。

但有人请解释问题是什么以及如何解决？

Answer 1

如果您遇到这些错误，则意味着您的IPv6连接不稳定，或者服务器已经死亡，或者找不到文件。 现在正在努力：

 http://[2001:67c:1562::13]/ubuntu/dists/raring-security/multiverse/binary-i386/ 

Answer 2

您可以在输出中看到的是您的计算机正在尝试使用IPV6地址（例如2001：67c：1562 :: 13）进行连接，这些地址与IPv4地址（例如192.168.0.1）不同。 你可以在这里有两种方法。 一个 – 按照以下步骤禁用IPv6：

1. 用任何文本编辑器打开你的/etc/sysctl.conf （你需要sudo ）。 我个人会做一些像sudo nano /etc/sysctl.conf是最简单的）或sudo vi /etc/sysctl.conf 。

2. 添加这些行

    net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 

3. 运行sudo sysctl --load以应用更改

第二种方式是使用IPv6 DNS。 例如，单击顶部面板中的网络指示器，选择Edit Connections ，对于特定的wifi或以太网连接，请使用2620:0:ccc::2 dns，即OpenDNS IPv6服务器 。 确保选择“仅地址”选项

Answer 3

更改您的网络代理设置与您用于访问此网页的网络代理设置同步（简言之，您的浏览器的代理）