解决github无法访问的问题，亲测有效。

• 最近发现github突然打不开了。经过一番搜索，终于找到一个改host的方法使得可以正常打开github，而且发现打开速度比之前还快。大家也可以试试。

• 在C:\Windows\System32\drivers\etc中打开host文件（可以用UE等编辑工具打开），在该文件中添加如下内容。

  # GitHub Host Start
  
  185.199.109.154              github.githubassets.com
  140.82.112.21                central.github.com
  185.199.108.133              desktop.githubusercontent.com
  185.199.109.153              assets-cdn.github.com
  185.199.111.133              camo.githubusercontent.com
  185.199.109.133              github.map.fastly.net
  151.101.1.194                github.global.ssl.fastly.net
  192.30.255.112               gist.github.com
  185.199.109.153              github.io
  192.30.255.113               github.com
  192.30.255.116               api.github.com
  185.199.111.133              raw.githubusercontent.com
  185.199.110.133              user-images.githubusercontent.com
  185.199.109.133              favicons.githubusercontent.com
  185.199.108.133              avatars5.githubusercontent.com
  185.199.109.133              avatars4.githubusercontent.com
  185.199.108.133              avatars3.githubusercontent.com
  185.199.108.133              avatars2.githubusercontent.com
  185.199.111.133              avatars1.githubusercontent.com
  185.199.109.133              avatars0.githubusercontent.com
  185.199.111.133              avatars.githubusercontent.com
  192.30.255.121               codeload.github.com
  52.217.113.73                github-cloud.s3.amazonaws.com
  52.217.121.41                github-com.s3.amazonaws.com
  16.182.66.161                github-production-release-asset-2e65be.s3.amazonaws.com
  16.182.32.177                github-production-user-asset-6210df.s3.amazonaws.com
  52.217.87.148                github-production-repository-file-5c1aeb.s3.amazonaws.com
  185.199.110.153              githubstatus.com
  140.82.112.17                github.community
  185.199.110.133              media.githubusercontent.com
  185.199.108.133              objects.githubusercontent.com
  185.199.110.133              raw.github.com
  20.221.80.166                copilot-proxy.githubusercontent.com
  
  # GitHub Host End

• 保存文件，重新刷新网页即可打开github了。
• github打开慢的同学，也可以试试这个方法。