curl: (7) Failed to connect to raw.githubusercontent.com port 443: Connection re

hosts文件添加如下内容

199.232.68.133 raw.githubusercontent.com
199.232.68.133 user-images.githubusercontent.com
199.232.68.133 avatars2.githubusercontent.com
199.232.68.133 avatars1.githubusercontent.com

参考：github.com/hawtim/blog…