github登录不上的问题
1.C盘:WindowsSystem32driversetc，找到hosts文件
2.如果hosts文件没有权限，可以点击文件属性》安全，得到下面页面。按照顺序操作即可
3.第二步操作结束之后，已经获取hosts的文件修改权限，此时输入以下内容
# GitHub Start
140.82.113.3 github.com
140.82.114.20 gist.github.com
151.101.184.133 assets-cdn.github.com
151.101.184.133 raw.githubusercontent.com
199.232.28.133 raw.githubusercontent.com
151.101.184.133 gist.githubusercontent.com
151.101.184.133 cloud.githubusercontent.com
151.101.184.133 camo.githubusercontent.com
199.232.96.133 avatars.githubusercontent.com
151.101.184.133 avatars0.githubusercontent.com
199.232.68.133 avatars0.githubusercontent.com
199.232.28.133 avatars0.githubusercontent.com
199.232.28.133 avatars1.githubusercontent.com
151.101.184.133 avatars1.githubusercontent.com
151.101.108.133 avatars1.githubusercontent.com
151.101.184.133 avatars2.githubusercontent.com
199.232.28.133 avatars2.githubusercontent.com
151.101.184.133 avatars3.githubusercontent.com
199.232.68.133 avatars3.githubusercontent.com
151.101.184.133 avatars4.githubusercontent.com
199.232.68.133 avatars4.githubusercontent.com
151.101.184.133 avatars5.githubusercontent.com
199.232.68.133 avatars5.githubusercontent.com
151.101.184.133 avatars6.githubusercontent.com
199.232.68.133 avatars6.githubusercontent.com
151.101.184.133 avatars7.githubusercontent.com
199.232.68.133 avatars7.githubusercontent.com
151.101.184.133 avatars8.githubusercontent.com
199.232.68.133 avatars8.githubusercontent.com
199.232.96.133 avatars9.githubusercontent.com
# GitHub End
4.第三步操作结束，此时如果去登github，仍然登录不上。接下来需要对DNS进行刷新
ipconfig /displaydns # 显示dns缓存
ipconfig /flushdns # 刷新DNS记录
ipconfig /renew # 重请从DHCP服务器获得IP
5.打开CMD，输入ipconfigflushdns.如果看到提示刷新成功，再去登录http://github.com就会显示登录了(20211020检测有效)