cdn加速
通过修改系统hosts文件的办法，绕过国内dns解析，直接访问GitHub的CDN节点，从而达到github访问加速的目的。不需要海外的服务器辅助。
GitHub在国内访问速度慢的问题原因有很多,但最直接和最主要的原因是GitHub的分发加速网络的域名遭到dns污染,下载网站上任何东西的时候会下半天,有时还会失败需要从头再来,多失败了几次又因访问次数过多被做了ip限制,让人恼火
做到以上需要三步
- 获取GitHub官方CDN地址
- 修改系统Hosts文件
- 刷新系统DNS缓存
1. 获取GitHub官方CDN地址
首先,打开
查询以下三个链接的DNS解析地址
- github.com
- assets-cdn.github.com
-
github.global.ssl.fastly.net
image-20220415135630207.png
2. 修改系统Hosts文件
接着,打开系统/etc下的hosts文件,需要切入到root用户修改
# 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
140.82.113.3 github.com
185.199.108.153 assets-cdn.github.com
199.232.69.194 github.global.ssl.fastly.net
并在末尾添加三行记录并保存。(需管理员权限，注意IP地址与域名间需留有空格)
对于ubuntu系统，修改完hosts文件执行如下命令:
sudo /etc/init.d/network-manager restart
3. 刷新系统DNS缓存
运行 ipconfig /flushdns 手动刷新系统DNS缓存。
mac系统修改完hosts文件,保存并退出就可以了.不要要多一步刷新操作.
centos系统执行/etc/init.d/network restart命令 使得hosts生效
