访问Github慢的解决办法

http://blog.csdn.net/sunsteam/article/details/63253933

http://tool.chinaz.com/dns

151.101.196.249  github.global.ssl.fastly.net
151.101.196.133 assets-cdn.github.com

vi /etc/hosts

C:\Windows\System32\drivers\etc

yum install -y nscd

/etc/rc.d/init.d/nscd restart

我们在命令行中输入/etc/rc.d/init.d/nscd restart，更新DNS缓存。此时，重新访问github，奇迹诞生了，访问速度嗖嗖的，完美解决访问慢的问题。妈妈再也不用 担心猿的继续深造了，大家可以试试，为人民服务。

一、修改DNS，加快GitHub访问

echo "151.101.196.249  github.global.ssl.fastly.net" >> /etc/hosts
echo "151.101.196.133 assets-cdn.github.com" >> /etc/hosts
/etc/rc.d/init.d/nscd restart

上面只是一个示例，为了能真正找到所在地区的最快DNS，建议使用下面的Python3脚本进行动态获取

#  # pip3 install beautifulsoup4
#   pip3 install requests
import requests
from bs4 import BeautifulSoup
import os
import json

list = [
    'github.com',
    'assets-cdn.github.com',
    'avatars0.githubusercontent.com',
    'avatars1.githubusercontent.com',
    'documentcloud.github.com',
    'gist.github.com',
    'help.github.com',
    'nodeload.github.com',
    'raw.github.com',
    'status.github.com',
    'training.github.com',
    'github.io']

host='/etc/hosts'
cmd='/etc/rc.d/init.d/nscd restart'

hostlines=[]

GitHubDomainList=[]

#将文件读取到内存中
with open(host,"r",encoding="utf-8") as f:
    hostlines = f.readlines()

for i in list:
    url = "http://ip.chinaz.com/" + i.strip()
    resp = requests.get(url)
    soup = BeautifulSoup(resp.text)
    x = soup.find(class_="IcpMain02")
    x = x.find_all("span", class_="Whwtdhalf")
    j_str='{\"ip\":\"'+x[5].string.strip()+'\",\"domain\":\"'+i.strip()+'\"}'
    mes=json.loads(j_str)
    GitHubDomainList.append(mes)

# 删除掉GitHub的域名IP定义
with open(host,encoding="utf-8",mode="w") as f_w:
    for line in hostlines:
        found=False
        for c in GitHubDomainList:
            if c["domain"] in line:
                found=True
                break
        if not found:
         f_w.write(line+'\n')

# 追加到最后GitHub的域名IP定义
with open(host,encoding="utf-8",mode='a') as f_w:
    for a in GitHubDomainList:
        f_w.write(a['ip'] + "     " + a["domain"]+'\n')
# 执行DNS刷新命令
print(os.popen(cmd).read())
print('恭喜，成功完成GitHub的最优DNS配置!')