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在 Linux 18.04 中无法使用 sudo apt-get update

tag-icon • tag-icon command-line apt 18.04
在 Linux 18.04 中无法使用 sudo apt-get update

这是我尝试运行 sudo apt-get update 或尝试安装任何东西时得到的输出。

sudo apt-get update 
Err:1 http://dl.google.com/linux/chrome/deb stable InRelease
  Could not resolve ‘dl.google.com’
Err:2 http://gb.archive.ubuntu.com/ubuntu bionic InRelease
  Could not resolve ‘gb.archive.ubuntu.com’
Err:3 http://gb.archive.ubuntu.com/ubuntu bionic-updates InRelease
  Could not resolve ‘gb.archive.ubuntu.com’
Err:4 http://gb.archive.ubuntu.com/ubuntu bionic-backports InRelease
  Could not resolve ‘gb.archive.ubuntu.com’
Err:5 http://security.ubuntu.com/ubuntu bionic-security InRelease
  Could not resolve ‘security.ubuntu.com’
Reading package lists... Done
W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/bionic/InRelease  Could not resolve ‘gb.archive.ubuntu.com’
W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/bionic-updates/InRelease  Could not resolve ‘gb.archive.ubuntu.com’
W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/bionic-backports/InRelease  Could not resolve ‘gb.archive.ubuntu.com’
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/bionic-security/InRelease  Could not resolve ‘security.ubuntu.com’
W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/InRelease  Could not resolve ‘dl.google.com’
W: Some index files failed to download. They have been ignored, or old ones used instead.

我也无法访问 github，告诉我 github 无法解析。

有任何线索可以解释这是什么原因造成的吗？

更新：来自 traceroute 的输出

traceroute dl.google.com
traceroute to dl.google.com (216.58.210.46), 30 hops max, 60 byte packets
 1  * * *
 2  * * *
 3  * * *
 4  * * *
 5  * * *
 6  * peer7-et-0-0-1.telehouse.ukcore.bt.net (62.172.103.158)  20.930 ms peer8-et-0-1-4.telehouse.ukcore.bt.net (109.159.252.106)  20.638 ms
 7  109.159.253.235 (109.159.253.235)  22.406 ms 195.99.126.75 (195.99.126.75)  25.586 ms 109.159.253.93 (109.159.253.93)  24.234 ms
 8  * * *
 9  72.14.236.224 (72.14.236.224)  27.654 ms 108.170.234.160 (108.170.234.160)  27.338 ms 74.125.252.128 (74.125.252.128)  28.687 ms
10  * * *
11  * * lhr25s11-in-f14.1e100.net (216.58.210.46)  20.101 ms

答案1

这听起来像是 DNS 问题。要修复它，您需要确保

/etc/resolv.conf 有 DNS 服务器的良好条目。

Google 有您可以使用的公共 DNS 服务器。

例如，您可以将以下两行添加到 /etc/resolv.conf 文件的顶部（这些指向 Google DNS 服务器），如上所述：

名称服务器 8.8.8.8 名称服务器 8.8.4.4

此外，如果您使用代理，请确保您已创建/修改文件 /etc/apt/apt.conf 以指定您的代理，如下所示：

获取::http::代理”http://你的代理:端口“；

获取::https::代理”http://你的代理:端口“；

获取::ftp::代理”http://你的代理:端口“；

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