1、打开Dns检测|Dns查询 - 站长工具
2、在检测输入栏中输入http://github.com官网 选一个最小的
3、找到host文件(怎么找百度下即可)把左侧的输入即可，如下（注意最后一行）：
# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host
# localhost name resolution is handled within DNS itself.
# 127.0.0.1 localhost
# ::1 localhost
#13.229.188.59 https://github.com
4、用WIN+R快捷键打开运行窗口，输入命令：cmd并回车进入命令行窗口。
接着输入命令：ipconfig /flushdns回车后执行刷新本地dns缓存数据即可。
