向/private/etc/hosts 中加入如下代码
#github 207.97.227.239 github.com www.github.com 207.97.227.252 nodeload.github.com 207.97.227.243 raw.github.com 204.232.175.78 documentcloud.github.com
#github 207.97.227.239 github.com www.github.com 207.97.227.252 nodeload.github.com 207.97.227.243 raw.github.com 204.232.175.78 documentcloud.github.com