即使不是发布日，从主 Ubuntu 存档下载也很慢，我如何让 apt-get 自动使用离我很近的镜像？
每次我尝试通过终端安装时，我都会得到这个“我无法安装或更新，我在这里找不到工作答案。这是我的 apt-get 更新结果：
点击 http://ppa.launchpad.net raring Release.gpg 点击 http://deb.opera.com stable Release.gpg 点击 http://ppa.launchpad.net raring Release.gpg 点击 http://deb.opera.com 稳定版 点击 http://ppa.launchpad.net raring 发布 点击 http://deb.opera.com stable/non-free i386 Packages 点击 http://ppa.launchpad.net raring 发布 点击 http://ppa.launchpad.net raring/main i386 Packages 点击 http://ppa.launchpad.net raring/main i386 Packages Ign http://deb.opera.com stable/non-free Translation-en_US Ign http://deb.opera.com stable/non-free Translation-en Ign http://ppa.launchpad.net raring/main Translation-en_US Ign http://ppa.launchpad.net raring/main 翻译-en Ign http://ppa.launchpad.net raring/main Translation-en_US Ign http://ppa.launchpad.net raring/main 翻译-en 错误 http://archive.ubuntu.com raring Release.gpg 解决“archive.ubuntu.com:http”（-11 - 系统错误）时发生了一些邪恶的事情 错误 http://extras.ubuntu.com raring Release.gpg 解决“extras.ubuntu.com:http”（-11 - 系统错误）时发生了一些邪恶的事情 错误 …
我开始Update information is outdated警觉了。我试过sudo apt-get update并得到这些错误：
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 …