DNS是一种将网址转化为IP地址的重要工具。如果你的电脑无法访问GitHub，那么极有可能是由于DNS出现了故障。解决此类问题的方法包括修改DNS服务器、使用可防止DNS污染的DNS服务提供商，或者使用VPN以避开DNS解析问题等。

此时只需要修改host文件将可访问的dns解析地址写入即可。

Table of Contents

查询DNS

使用dns监测查询工具

https://tool.chinaz.com/dns

https://dnsdaquan.com/

输入无法访问的IP github.com 进行检测

查询到可访问的ip为 20.205.243.166

Windows修改

以管理员权限启动CMD

编辑hosts文件

notepad c:\windows\system32\drivers\etc\hosts

直接写入

echo 20.205.243.166 github.com >> c:\windows\system32\drivers\etc\hosts

刷新dns缓存

ipconfig/flushdns

Linux修改

编辑 hosts文件

sudo vim /etc/hosts

直接写入

echo 20.205.243.166 github.com >> \etc\hosts

刷新dns缓存

清楚缓存

sudo systemd-resolve --flush-caches

重启网络

sudo service network-manager restart
 或
sudo systemctl restart network

备选内容

几个可解析IP

140.82.112.3    github.com
140.82.112.4    github.com
20.205.243.16   github.com
31.13.80.169    github.global.ssl.fastly.net
199.232.5.194   github.global.ssl.fastly.net
185.199.109.153 appimage.github.io
151.101.100.133 raw.githubusercontent.com
185.199.108.154 github.githubassets.com
140.82.113.22   central.github.com
185.199.108.133 desktop.githubusercontent.com
185.199.108.153 assets-cdn.github.com
185.199.108.133 camo.githubusercontent.com
185.199.108.153 github.io
140.82.114.5    api.github.com
185.199.108.133 raw.githubusercontent.com
185.199.108.133 user-images.githubusercontent.com
185.199.108.133 favicons.qithubusercontent.com
185.199.108.133 avatars5.githubusercontent.com
185.199.108.133 avatars4.githubusercontent.com
185.199.108.133 avatars3.githubusercontent.com
185.199.108.133 avatars2.githubusercontent.com
185.199.108.133 avatars1.githubusercontent.com
185.199.108.133 avatars0.githubusercontent.com
185.199.108.133 avatars.githubusercontent.com
140.82.113.18   codeload.github.com
52.217.69.204   qithub-cloud.s3.amazonaws. com
52.216.179.211  github-com.s3.amazonaws.com
52.217.193.113  github-production-release-asset-2e65be.s3amazonaws.com
52.216.185.107  github-production-user-asset-6210dfs3.amazonaws.com
52.217.13.92    github-production-repository-file-5c1aeb.s3.amazonaws.com
185.199.108.153 githubstatus.com
140.82.112.18   github.community
185.199.108.133 media.githubusercontent.com