我刚刚从 VPS 提供商那里购买了服务器空间。我要做的第一件事就是安装最新版本的 Nginx。我按照 Nginx 的官方说明进行操作这里。一切都很顺利，直到我运行sudo apt-get update。出于某种原因，似乎/etc/apt/sources.list除了我手动添加的 Nginx 存储库之外，所有存储库都更新正确。
我的局域网上有一个测试服务器，我的设置与这个虚拟专用服务器完全相同，所以我知道配置有效。
我对这一切还比较陌生，我不知道是什么原因造成的，我在网上也找不到遇到同样问题的人，但是我根据找到的信息尝试了以下诊断步骤：
删除了所有名称服务器/etc/resolv.conf，只添加了谷歌的8.8.8.8- 并没有解决问题，然后当我运行时，所有的存储库都出现了错误sudo apt-get update
每当我尝试做ping任何事情时，结果总是connect: Network is unreachable
但如果我运行host www.google.com，例如，我会得到这个输出：
www.google.com has address 74.125.28.147
www.google.com has address 74.125.28.99
www.google.com has address 74.125.28.103
www.google.com has address 74.125.28.104
www.google.com has address 74.125.28.105
www.google.com has address 74.125.28.106
www.google.com has IPv6 address 2607:f8b0:400e:c04::93
这是输出sudo apt-get update
Err http://nginx.org trusty InRelease
Err http://nginx.org trusty Release.gpg
Could not resolve 'nginx.org'
Ign http://mirrors.gandi.net trusty InRelease
Hit http://mirrors.gandi.net trusty Release.gpg
Hit http://mirrors.gandi.net trusty Release
Ign http://us.archive.ubuntu.com trusty InRelease
Ign http://security.ubuntu.com trusty-security InRelease
Hit http://mirrors.gandi.net trusty/main amd64 Packages
Ign http://us.archive.ubuntu.com trusty-updates InRelease
Get:1 http://security.ubuntu.com trusty-security Release.gpg [933 B]
Ign http://us.archive.ubuntu.com trusty-backports InRelease
Get:2 http://security.ubuntu.com trusty-security Release [63.5 kB]
Hit http://us.archive.ubuntu.com trusty Release.gpg
Ign http://mirrors.gandi.net trusty/main Translation-en
Get:3 http://us.archive.ubuntu.com trusty-updates Release.gpg [933 B]
Hit http://us.archive.ubuntu.com trusty-backports Release.gpg
Hit http://us.archive.ubuntu.com trusty Release
Get:4 http://security.ubuntu.com trusty-security/main Sources [80.6 kB]
Get:5 http://us.archive.ubuntu.com trusty-updates Release [63.5 kB]
Hit http://us.archive.ubuntu.com trusty-backports Release
Get:6 http://security.ubuntu.com trusty-security/restricted Sources [2061 B]
Hit http://us.archive.ubuntu.com trusty/main Sources
Get:7 http://security.ubuntu.com trusty-security/universe Sources [24.9 kB]
Hit http://us.archive.ubuntu.com trusty/restricted Sources
Get:8 http://security.ubuntu.com trusty-security/multiverse Sources [2335 B]
Hit http://us.archive.ubuntu.com trusty/universe Sources
Get:9 http://security.ubuntu.com trusty-security/main amd64 Packages [268 kB]
Hit http://us.archive.ubuntu.com trusty/multiverse Sources
Hit http://us.archive.ubuntu.com trusty/main amd64 Packages
Hit http://us.archive.ubuntu.com trusty/restricted amd64 Packages
Hit http://us.archive.ubuntu.com trusty/universe amd64 Packages
Hit http://us.archive.ubuntu.com trusty/multiverse amd64 Packages
Hit http://us.archive.ubuntu.com trusty/main Translation-en
Get:10 http://security.ubuntu.com trusty-security/restricted amd64 Packages [8875 B]
Hit http://us.archive.ubuntu.com trusty/multiverse Translation-en
Get:11 http://security.ubuntu.com trusty-security/universe amd64 Packages [103 kB]
Hit http://us.archive.ubuntu.com trusty/restricted Translation-en
Get:12 http://security.ubuntu.com trusty-security/multiverse amd64 Packages [3680 B]
Hit http://us.archive.ubuntu.com trusty/universe Translation-en
Hit http://security.ubuntu.com trusty-security/main Translation-en
Get:13 http://us.archive.ubuntu.com trusty-updates/main Sources [202 kB]
Hit http://security.ubuntu.com trusty-security/multiverse Translation-en
Hit http://security.ubuntu.com trusty-security/restricted Translation-en
Hit http://security.ubuntu.com trusty-security/universe Translation-en
Get:14 http://us.archive.ubuntu.com trusty-updates/restricted Sources [2564 B]
Get:15 http://us.archive.ubuntu.com trusty-updates/universe Sources [117 kB]
Get:16 http://us.archive.ubuntu.com trusty-updates/multiverse Sources [5161 B]
Get:17 http://us.archive.ubuntu.com trusty-updates/main amd64 Packages [516 kB]
Get:18 http://us.archive.ubuntu.com trusty-updates/restricted amd64 Packages [9238 B]
Get:19 http://us.archive.ubuntu.com trusty-updates/universe amd64 Packages [279 kB]
Get:20 http://us.archive.ubuntu.com trusty-updates/multiverse amd64 Packages [12.0 kB]
Hit http://us.archive.ubuntu.com trusty-updates/main Translation-en
Hit http://us.archive.ubuntu.com trusty-updates/multiverse Translation-en
Hit http://us.archive.ubuntu.com trusty-updates/restricted Translation-en
Hit http://us.archive.ubuntu.com trusty-updates/universe Translation-en
Hit http://us.archive.ubuntu.com trusty-backports/main Sources
Hit http://us.archive.ubuntu.com trusty-backports/restricted Sources
Hit http://us.archive.ubuntu.com trusty-backports/universe Sources
Hit http://us.archive.ubuntu.com trusty-backports/multiverse Sources
Hit http://us.archive.ubuntu.com trusty-backports/main amd64 Packages
Hit http://us.archive.ubuntu.com trusty-backports/restricted amd64 Packages
Hit http://us.archive.ubuntu.com trusty-backports/universe amd64 Packages
Hit http://us.archive.ubuntu.com trusty-backports/multiverse amd64 Packages
Hit http://us.archive.ubuntu.com trusty-backports/main Translation-en
Hit http://us.archive.ubuntu.com trusty-backports/multiverse Translation-en
Hit http://us.archive.ubuntu.com trusty-backports/restricted Translation-en
Hit http://us.archive.ubuntu.com trusty-backports/universe Translation-en
Fetched 1766 kB in 9s (189 kB/s)
Reading package lists... Done
W: Failed to fetch http://nginx.org/packages/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://nginx.org/packages/ubuntu/dists/trusty/Release.gpg Could not resolve 'nginx.org'
W: Some index files failed to download. They have been ignored, or old ones used instead.
/etc/apt/sources.list这些是我添加到Nginx末尾的行：
deb http://nginx.org/packages/ubuntu/ trusty nginx
deb-src http://nginx.org/packages/ubuntu/ trusty nginx
答案1
问题是，虚拟专用服务器仅具有 IPv6 接口，并且当提出该问题时，官方 Nginx 包的位置不支持 IPv6。
我使用的托管公司免费提供 IPv6 接口，如果您需要 IPv4 接口，则需要额外收费（因为 IPv4 地址已不可用，所以他们试图节省它们）。
解决方案就是支付 IPv4 接口费用。实施 IPv4 接口后，更新工作顺利进行。