1. 查看失效头像链接

例如,域名可能为avatars.githubusercontent.com
2. 查找域名对应IP
https://www.ipaddress.com/

3. 解决问题:修改hosts
解决方法,打开路径C:\Windows\System32\drivers\etc下的hosts文件,并在后面添加下列信息,将IP与域名对应即可
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 | # GitHub Start 140.82.113.3      github.com
 140.82.113.4     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
 199.232.96.133     avatars.githubusercontent.com
 151.101.184.133    avatars0.githubusercontent.com
 199.232.96.133     avatars0.githubusercontent.com
 151.101.184.133    avatars1.githubusercontent.com
 199.232.96.133     avatars1.githubusercontent.com
 151.101.184.133    avatars2.githubusercontent.com
 199.232.96.133     avatars2.githubusercontent.com
 151.101.184.133    avatars3.githubusercontent.com
 199.232.96.133     avatars3.githubusercontent.com
 151.101.184.133    avatars4.githubusercontent.com
 199.232.96.133     avatars4.githubusercontent.com
 151.101.184.133    avatars5.githubusercontent.com
 199.232.96.133     avatars5.githubusercontent.com
 151.101.184.133    avatars6.githubusercontent.com
 199.232.96.133     avatars6.githubusercontent.com
 151.101.184.133    avatars7.githubusercontent.com
 199.232.96.133     avatars7.githubusercontent.com
 151.101.184.133    avatars8.githubusercontent.com
 199.232.96.133     avatars8.githubusercontent.com
 
 # GitHub End
 
 | 
如果受管理权限限制,则新建并复制。