我正在家用服务器上试用 Ubuntu Server 12.04，但更新不起作用。不知道原因。
我已执行 sudo su 和 apt-get update。之后我得到以下内容：
Err gb.archive.ubuntu.com precise InRelease
Err gb.archive.ubuntu.com precise-updates InRelease
Err gb.archive.ubuntu.com precise-backports InRelease
Err security.ubuntu.com precise-security InRelease
Err archive.canonical.com precise InRelease
Err extras.ubuntu.com precise InRelease
Err gb.archive.ubuntu.com precise Release.gpg
Temporary failure resolving âgb.archive.ubuntu.comâ
Err gb.archive.ubuntu.com precise-updates Release.gpg
Temporary failure resolving âgb.archive.ubuntu.comâ
Err security.ubuntu.com precise-security Release.gpg
Temporary failure resolving âsecurity.ubuntu.comâ
Err archive.canonical.com precise Release.gpg
Temporary failure resolving âarchive.canonical.comâ
Err gb.archive.ubuntu.com precise-backports Release.gpg
Temporary failure resolving âgb.archive.ubuntu.comâ
Err extras.ubuntu.com precise Release.gpg
Temporary failure resolving âextras.ubuntu.comâ
Reading package lists... Done
W: Failed to fetch gb.archive.ubuntu.com/ubuntu/dists/precise/InRelease
W: Failed to fetch gb.archive.ubuntu.com/ubuntu/dists/precise-updates/InRelease
W: Failed to fetch gb.archive.ubuntu.com/ubuntu/dists/precise-backports/InRelease
W: Failed to fetch security.ubuntu.com/ubuntu/dists/precise-security/InRelease
W: Failed to fetch archive.canonical.com/ubuntu/dists/precise/InRelease
W: Failed to fetch extras.ubuntu.com/ubuntu/dists/precise/InRelease
W: Failed to fetch gb.archive.ubuntu.com/ubuntu/dists/precise/Release.gpg Temporary failure resolving âgb.archive.ubuntu.comâ
W: Failed to fetch gb.archive.ubuntu.com/ubuntu/dists/precise-updates/Release.gpg Temporary failure resolving âgb.archive.ubuntu.comâ
W: Failed to fetch gb.archive.ubuntu.com/ubuntu/dists/precise-backports/Release.gpg Temporary failure resolving âgb.archive.ubuntu.comâ
W: Failed to fetch security.ubuntu.com/ubuntu/dists/precise-security/Release.gpg Temporary failure resolving âsecurity.ubuntu.comâ
W: Failed to fetch archive.canonical.com/ubuntu/dists/precise/Release.gpg Temporary failure resolving âarchive.canonical.comâ
W: Failed to fetch extras.ubuntu.com/ubuntu/dists/precise/Release.gpg Temporary failure resolving âextras.ubuntu.comâ
W: Some index files failed to download. They have been ignored, or old ones used instead.
有一些奇怪的字符没有出现在 /etc/apt/sources.list 中
大家有什么想法吗？NB：我必须删除 http://，否则我就无法发帖。
短暂性脑缺血发作
戴夫
答案1
我认为奇怪的字符是由于您的区域设置造成的，但我不认为这是您的问题。
暂时无法解析“gb.archive.ubuntu.com”
然而，这表明您的机器正在使用配置的 DNS 解析器，/etc/resolv.conf无法解析gb.archive.ubuntu.com
遇到此错误时，请检查命令是否host gb.archive.ubuntu.com返回如下 IP 地址列表：
gb.archive.ubuntu.com has address 194.169.254.10
gb.archive.ubuntu.com has address 91.189.92.156
gb.archive.ubuntu.com has address 91.189.92.177
gb.archive.ubuntu.com has address 91.189.92.200
gb.archive.ubuntu.com has address 91.189.92.201
gb.archive.ubuntu.com has address 91.189.92.202
gb.archive.ubuntu.com has IPv6 address 2a01:450:10:1::10
如果没有，请查看前面提到的文件中的解析器配置 - 它应该至少包含一行，其中nameserver x.x.x.xxxxx 是解析器的 IP 地址。
如果存在，您可以暂时使用已知有效的公共解析器：
echo 'nameserver 8.8.8.8' > /etc/resolv.conf
然后看看它是否有效。如果这没有帮助，你可能有一个更严重的网络问题，但这应该可以帮助你入门。
答案2
我的问题出在 的接口文件中/etc/network/interfaces。在 Ubuntu 12.04 中，你必须有一个 dns-nameservers 行，例如
dns-nameservers 8.8.8.8 8.8.4.4
编辑此文件并将 8.8.8.8 8.8.4.4 替换为您的名称服务器 IP，每个 IP 之间用空格分隔。如果没有此行，请添加它。然后重新启动您的网络：
/etc/init.d/networking restart
在这种情况下，这解决了 DNS 问题。