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无法连接到 172.16.0.3:8080 (172.16.0.3)，连接超时

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无法连接到 172.16.0.3:8080 (172.16.0.3)，连接超时

我尝试
按照以下步骤在 Linux Ubuntu 16.4 上安装 Krita：

sudo add-apt-repository ppa:kubuntu-ppa/backports 
sudo apt-get update 
sudo apt-get install krita

当我尝试第二个命令（用于更新）时，我得到了这个：

    Err:1 http://rs.archive.ubuntu.com/ubuntu xenial InRelease                               
  Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
Err:2 http://rs.archive.ubuntu.com/ubuntu  xenial-backports InRelease                 
  Unable to connect to 172.16.0.3:8080:
Err:3  http://rs.archive.ubuntu.com/ubuntu  xenial-updates InRelease                  
  Unable to connect to 172.16.0.3:8080:
Err:4 http://archive.canonical.com/ubuntu  xenial InRelease                             
  Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
Err:5 http://dl.google.com/linux/chrome/deb stable InRelease                             
 Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
Err:6 http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu xenial InRelease              
  Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
Err:7  http://security.ubuntu.com/ubuntu xenial-security InRelease                        
  Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
Reading package lists... Done             
W: Failed to fetch  http://rs.archive.ubuntu.com/ubuntu/dists/xenial/InRelease   Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
W: Failed to fetch  http://rs.archive.ubuntu.com/ubuntu/dists/xenial-backports/InRelease  Unable to connect to 172.16.0.3:8080:
W: Failed to fetch   http://security.ubuntu.com/ubuntu/dists/xenial-security/InRelease  Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
W: Failed to http://archive.canonical.com/ubuntu/dists/xenial/InRelease  Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
W: Failed to fetch http://rs.archive.ubuntu.com/ubuntu/dists/xenial-updates/InRelease  Unable to connect to 172.16.0.3:8080:
W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/InRelease   Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
W: Failed to fetch http://ppa.launchpad.net/kubuntu-ppa/backports/ubuntu/dists/xenial/InRelease Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out
W: Some index files failed to download. They have been ignored, or old ones used instead.

-我没有使用代理
-第一个命令也不起作用：

gpg: keyserver receive failed: keyserver error

- 第三个命令也是如此，但我不会输入有关第三个命令的任何内容，因为我认为主要问题是：

Could not connect to 172.16.0.3:8080 (172.16.0.3), connection timed out

-我尝试了这个（所以我认为防火墙不是问题）：

sudo ufw disable

我应该怎么做才能更新操作系统并安装 Krita（或任何其他应用程序）？

答案1

您的 DNS 出现问题。rs.archive.ubuntu.com应解析为 147.91.175.253，但在您的环境中，您将获得 172.16.0.3，这是 RFC 1918 空间中的一个地址，即旨在在本地网络中使用的地址。进一步查看日志，您将获得 172.16.0.3每一个DNS 查找。

检查您的/etc/resolv.confDNS 服务器并查看您使用的是什么。如果您不在可能会给您带来麻烦的公司网络上，请开始使用 Google 的 DNS 服务器 8.8.8.8。如果您使用的是公司网络，请与 IT 人员联系。

答案2

可能是因为 /etc/apt/apt.conf 包含： Acquire::http::Proxy "http://172.16.0.3:8080/";删除其内容后， sudo apt-get update 应该可以正常工作。

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