CentOS7 启动、关闭、重启、查看mysql服务

1. 启动 : service mysqld start
2. 关闭: service mysqld stop
3. 重启: service mysqld restart
4. 查看服务状态:service mysqld status
5. 查看MySql系统配置:cat /etc/my.cnf
6. centos 重启:shutdown或reboot