修改hosts文件
# GitHub Start 192.30.253.112 github.com 192.30.253.119 gist.github.com 199.232.28.133 assets-cdn.github.com 199.232.28.133 raw.githubusercontent.com 199.232.28.133 gist.githubusercontent.com 199.232.28.133 cloud.githubusercontent.com 199.232.28.133 camo.githubusercontent.com 199.232.28.133 avatars0.githubusercontent.com 199.232.28.133 avatars1.githubusercontent.com 199.232.28.133 avatars2.githubusercontent.com 199.232.28.133 avatars3.githubusercontent.com 199.232.28.133 avatars4.githubusercontent.com 199.232.28.133 avatars5.githubusercontent.com 199.232.28.133 avatars6.githubusercontent.com 199.232.28.133 avatars7.githubusercontent.com 199.232.28.133 avatars8.githubusercontent.com # GitHub End