腾讯云centos7 环境搭建（1）mysql安装

参考地址： http://www.javashuo.com/article/p-rsugqypn-gb.html https://www.linuxidc.com/Linux/2017-12/149614.htm http://bbs.qcloud.com/thread-42985-1-1.htmlphp 1.环境检查 安装前看是否安装过mysqlhtml yum list installed m

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