centos下安装MySQL -Telegraf+InfluxDB+Grafana系列1，安装MySQL
https://www.cnblogs.com/starof/p/4680083.html
1，下载安装 # wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm # rpm -ivh mysql-community-release-el7-5.noarch.rpm # yum install mysql-community-server
2，重启服务
# service mysqld restart
直接使用如下命令即可：参考；链接https://blog.****.net/qq_42112846/article/details/99703665
使用如下命令操作mysql：
systemctl restart mysqld.service
systemctl start mysqld.service
systemctl stop mysqld.service
3，登录
mysql -u root #初次登录没有密码
验证是否安装成功
1，设置开机启动：sudo systemctl enable --now mysqld
2，检查MySql服务器状态:sudo systemctl status mysqld
说明：看到Active(Running)字样，说明正常运行