http://www.cnblogs.com/laowu-blog/p/5073665.html
http://www.cnblogs.com/chenpi/p/5137310.html
http://www.cnblogs.com/liyingxiang/p/5877764.html
http://www.cnblogs.com/lexus/archive/2011/11/30/2268896.html
https://help.ubuntu.com/lts/serverguide/NTP.html
http://favortel.blog.sohu.com/151614416.html
http://blog.163.com/love_python/blog/static/1834265632011319101353859/
http://zhaoyan0922-photo.blog.163.com/blog/static/262384412015113075510270/
https://wenku.baidu.com/view/a0e20a23192e45361066f5c2.html
https://stackoverflow.com/questions/26770051/parse-json-in-mysql
https://stackoverflow.com/questions/12511933/how-create-json-format-with-group-concat-mysql
https://www.2cto.com/database/201310/252702.html
ntp：
http://www.cnblogs.com/xwdreamer/p/3448773.html
https://www.server-world.info/en/note?os=Ubuntu_17.04&p=ntp&f=1
sources.list
http://blog.sina.com.cn/s/blog_a9ec68810102uxw1.html
django inspectdb
http://blog.csdn.net/wizardforcel/article/details/47056435
python exception
http://www.cnblogs.com/fnng/p/3518202.html
http://www.cnblogs.com/wanpython/archive/2013/05/23/3095530.html
http://www.cnblogs.com/thomas-lee/archive/2011/10/10/2205299.html
mysql events
http://blog.csdn.net/baochao95/article/details/45951201
http://www.codes51.com/article/detail_307633.html
https://zhidao.baidu.com/question/1639191413315758220.html
http://www.tuicool.com/articles/iEri6bE
mysql only_full_group_by
http://www.cnblogs.com/jim2016/p/6322703.html
http://www.cnblogs.com/jackydalong/archive/2013/10/21/3380689.html
mysql json support
http://blog.csdn.net/aasmfox/article/details/47663385
mysql trigger
http://blog.csdn.net/eastmount/article/details/52344036
http://www.cnblogs.com/hitwtx/archive/2011/07/25/2116014.html
https://yq.aliyun.com/ziliao/3897
mysql procedure
https://yq.aliyun.com/articles/112753
group concat
mysql function
http://www.cnblogs.com/zhangminghui/p/4113160.html
js asyn
http://www.cnblogs.com/tiwlin/archive/2011/12/26/2302554.html
https://foio.github.io/javascript-async/
http://www.cnblogs.com/tiwlin/archive/2011/12/26/2302554.html
rem:
http://www.cnblogs.com/leejersey/p/3662612.html
