linux网页资料链接

http://lab.xmirror.cn/  玄镜官网

https://blog.csdn.net/zxgmdzz/article/details/79207944      Navicat Premium 12.0.23安装与激活

https://www.server110.com/nginx/201312/4409.html          Nginx 502错误原因和解决方法总结

https://www.bt.cn/btcode.html   宝塔linux面板命令大全

https://www.cnblogs.com/kevingrace/p/5707003.html 完整部署CentOS7.2+OpenStack+kvm 云平台环境（1）--基础环境搭建

https://docs.openstack.org/liberty/zh_CN/install-guide-rdo/launch-instance.html OpenStack官网中文资料

https://www.cmsky.com/linux-speedtest-cli/linux下使用speedtest测速

https://www.cnblogs.com/yjd_hycf_space/p/7994597.htmlLDAP服务器的概念和原理简单介绍

https://www.cnblogs.com/yinzhengjie/p/9029542.htmlMySQL数据库语法-多表查询练习一

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http://www.cnblogs.com/wupeiqi/articles/5729934.htmlMySQL练习题

http://www.cnblogs.com/yuanchenqi/articles/7148750.htmlmysql数据库

http://www.cnblogs.com/aspnethot/articles/1397130.htmlMySQL之alter语句用法总结

http://blog.jobbole.com/55086/ 十步完全理解 SQL

http://blog.51cto.com/ixdba/1751377