linux下无法登陆github官网解决方案

执行 sudo vi /etc/hosts
修改文件内容：

# 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
151.101.184.133    gist.githubusercontent.com
151.101.184.133    cloud.githubusercontent.com
151.101.184.133    camo.githubusercontent.com
151.101.184.133    avatars0.githubusercontent.com
199.232.68.133     avatars0.githubusercontent.com
199.232.28.133     avatars1.githubusercontent.com
151.101.184.133    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
# GitHub End

按下 esc键, 然后输入 :wq
会出现如下错误 E45: ‘readonly’ option is set (add ! to override)
这时先强制退出, 输入 :q!
然后输入 sudo !!
输入密码后, 就可以编辑文件了
编辑完文件后按下 esc键, 然后输入 :wq!
验证文件已被编辑: cat /etc/hosts
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参考链接

链接1: Linux 解决 hosts 文件无法修改: ‘readonly‘ option is set (add ! to override)
链接2: linux下无法登陆github官网的解决方案